In biology laboratories, compound microscopes are essential for viewing magnified images of microscopic cells or organisms. Therefore the correct answer is compound microscope [D]. These microscopes employ multiple lenses to magnify specimens, enabling scientists to study intricate biological structRead more
In biology laboratories, compound microscopes are essential for viewing magnified images of microscopic cells or organisms. Therefore the correct answer is compound microscope [D]. These microscopes employ multiple lenses to magnify specimens, enabling scientists to study intricate biological structures and processes that are otherwise invisible to the naked eye. Compound microscopes utilize a combination of objective and eyepiece lenses to achieve high magnification and resolution. This setup allows researchers to observe cellular organelles, microorganisms, and other minute structures with precision. Option A, a photo camera, is used for capturing images rather than direct observation. A simple microscope (option B) uses a single lens and is limited in magnification compared to a compound microscope. Option D, a telescope, is designed for viewing distant objects and is not suitable for magnifying microscopic specimens. Therefore, the compound microscope (option C) stands out as the primary tool used in biology laboratories for examining and studying microscopic life and cellular structures.
A watchmaker relies on a magnifying lens to see the fine details of a watch's components ; option [B]. This tool is crucial for magnifying small parts like gears, springs, and screws, enabling precise inspection and intricate repair work. Unlike a compound microscope (option C), which is designed foRead more
A watchmaker relies on a magnifying lens to see the fine details of a watch’s components ; option [B]. This tool is crucial for magnifying small parts like gears, springs, and screws, enabling precise inspection and intricate repair work. Unlike a compound microscope (option C), which is designed for viewing microscopic objects with high magnification, a magnifying lens provides sufficient enlargement for detailed examination of watch parts without requiring such extreme magnification. Option A, a photo camera, is used for capturing images rather than for direct visual inspection. Option D, a telescope, is designed for viewing distant objects and would not be suitable for examining close-up details of a watch. Therefore, a magnifying lens (option B) is the most appropriate tool for a watchmaker to accurately work on the delicate mechanisms within a watch.
A telescope is an optical instrument designed to observe distant objects by collecting and focusing light. It typically uses lenses or mirrors (or both) to gather and magnify the incoming light from distant objects, making them appear larger and clearer than they would to the naked eye; option [A].Read more
A telescope is an optical instrument designed to observe distant objects by collecting and focusing light. It typically uses lenses or mirrors (or both) to gather and magnify the incoming light from distant objects, making them appear larger and clearer than they would to the naked eye; option [A]. Telescopes are crucial tools in astronomy, allowing astronomers to study celestial objects such as stars, planets, galaxies, and nebulae in detail. They can also be used for terrestrial observation, such as in surveillance or birdwatching. Telescopes come in various types, including refracting telescopes that use lenses to bend light and reflecting telescopes that use mirrors to reflect and focus light. Option A suggests seeing distant objects, which aligns with the purpose of telescopes. Options B and C are unrelated to the function of telescopes, and option D dismisses any connection to the correct function of a telescope.
Lumen is a unit used to measure luminous flux, which represents the total amount of visible light emitted by a light source per unit of time. The correct answer is [A] luminous flux. Luminous flux quantifies the brightness of light as perceived by the human eye, regardless of the direction in whichRead more
Lumen is a unit used to measure luminous flux, which represents the total amount of visible light emitted by a light source per unit of time. The correct answer is [A] luminous flux. Luminous flux quantifies the brightness of light as perceived by the human eye, regardless of the direction in which the light is emitted. It is crucial in determining the light output of light bulbs, LED lamps, and other light sources, providing a standardized measure of their brightness. Luminous intensity (option B) measures the brightness of a light source in a specific direction and is expressed in candelas (cd). Illuminance (option C) measures the amount of light incident on a surface per unit area and is expressed in lux (lx). Brightness (option D) is a subjective term referring to the perceived intensity of light, which can vary based on individual perception and environmental factors.
Nearsightedness, also known as myopia, is a common vision condition where a person can see objects clearly at close range but has difficulty seeing objects that are farther away. The correct answer is [A] Nearsightedness. This is because the eye focuses light rays in front of the retina rather thanRead more
Nearsightedness, also known as myopia, is a common vision condition where a person can see objects clearly at close range but has difficulty seeing objects that are farther away. The correct answer is [A] Nearsightedness. This is because the eye focuses light rays in front of the retina rather than directly on its surface. Myopia occurs when the eyeball is too long or the cornea has too much curvature. As a result, individuals with myopia may struggle to see objects beyond a certain distance, such as those more than 1 meter away. This condition can be corrected with the use of concave lenses in eyeglasses or contact lenses, which help to diverge the light rays entering the eye, shifting the focal point back onto the retina. Farsightedness (hyperopia) affects near vision, while a disease of the talus pertains to issues with a bone in the ankle and is unrelated to vision problems.
Myopia, commonly known as nearsightedness, is a vision defect where distant objects appear blurry while close objects can be seen clearly. The correct answer is [C] Myopia. This condition occurs because the eye focuses light in front of the retina rather than directly on it. The eyeball may be too lRead more
Myopia, commonly known as nearsightedness, is a vision defect where distant objects appear blurry while close objects can be seen clearly. The correct answer is [C] Myopia. This condition occurs because the eye focuses light in front of the retina rather than directly on it. The eyeball may be too long, or the cornea may have too much curvature, leading to improper focusing of light. As a result, a person with myopia has difficulty seeing objects that are far away, such as those beyond 10 meters. This vision defect can be corrected with concave lenses, which diverge light rays before they enter the eye, allowing the focal point to move back onto the retina for clear vision. Hypermetropia (farsightedness) affects near vision, hydrophobia is a fear of water, and cataracts cause clouding of the eye’s lens, affecting overall vision clarity but not specifically distance vision.
Hypermetropia, also known as hyperopia, is a vision condition where distant objects are seen more clearly than near objects. The correct answer is [B] Farsightedness. This occurs because the eye focuses light behind the retina rather than directly on it. The eye may be too short, or the cornea may hRead more
Hypermetropia, also known as hyperopia, is a vision condition where distant objects are seen more clearly than near objects. The correct answer is [B] Farsightedness. This occurs because the eye focuses light behind the retina rather than directly on it. The eye may be too short, or the cornea may have too little curvature, resulting in improper focusing. This causes near objects to appear blurry while distant objects remain in clear focus. Hypermetropia can be corrected using convex lenses, which converge light rays before they enter the eye, moving the focal point forward onto the retina. This adjustment allows for clear vision of nearby objects. Unlike nearsightedness (myopia), which affects distance vision, hypermetropia specifically impacts close-up vision. Presbyopia, another vision condition related to aging, also affects near vision but is distinct from hypermetropia. Warm blood is unrelated to vision and refers to an organism’s ability to regulate its body temperature independently of the environment.
Myopia, commonly referred to as nearsightedness, is a vision condition in which close objects appear clear, but distant objects are blurry. The correct answer is [B] Nearsightedness. This occurs when the eye's shape causes light rays to focus at a point in front of the retina rather than directly onRead more
Myopia, commonly referred to as nearsightedness, is a vision condition in which close objects appear clear, but distant objects are blurry. The correct answer is [B] Nearsightedness. This occurs when the eye’s shape causes light rays to focus at a point in front of the retina rather than directly on its surface. The eyeball may be too long, or the cornea may have too much curvature. This improper focusing prevents light from being correctly interpreted by the brain, resulting in a blurred image of distant objects. Myopia can be corrected using concave lenses, which diverge light rays before they enter the eye, moving the focal point back onto the retina. Corrective measures include eyeglasses, contact lenses, or refractive surgery. Unlike farsightedness (hyperopia), where the difficulty lies in seeing close objects, myopia specifically affects distance vision. Color blindness and night blindness are unrelated conditions affecting color perception and low-light vision, respectively.
Farsightedness, also known as hyperopia, is a common vision condition where distant objects are seen more clearly than near ones because the eye focuses light behind the retina rather than directly on it. The correct answer is [C] Convex lens. To correct this condition, convex lenses are used. ConveRead more
Farsightedness, also known as hyperopia, is a common vision condition where distant objects are seen more clearly than near ones because the eye focuses light behind the retina rather than directly on it. The correct answer is [C] Convex lens. To correct this condition, convex lenses are used. Convex lenses, also known as converging lenses, have a shape that is thicker at the center and thinner at the edges. They work by converging light rays before they enter the eye, helping to shift the focal point forward so that it falls directly on the retina. This adjustment allows individuals with hyperopia to see nearby objects more clearly. Convex lenses are commonly used in eyeglasses and contact lenses prescribed for people with farsightedness. Concave lenses, convex mirrors, and concave mirrors are not suitable for correcting farsightedness, as they have different optical properties and are used for different purposes in vision correction and optics.
Bifocal lenses are specifically designed to correct presbyopia, a condition common in older adults where the eyes lose their ability to focus on close objects. Bifocal lenses have two distinct optical powers to aid in viewing both near and distant objects. On the other hand, astigmatism, which causeRead more
Bifocal lenses are specifically designed to correct presbyopia, a condition common in older adults where the eyes lose their ability to focus on close objects. Bifocal lenses have two distinct optical powers to aid in viewing both near and distant objects. On the other hand, astigmatism, which causes blurred vision due to the irregular shape of the cornea or lens, is corrected using cylindrical lenses. These lenses are designed to compensate for the uneven curvature of the eye and provide clear vision at all distances. Concave lenses are prescribed for nearsightedness (myopia), while convex lenses are used for farsightedness (hyperopia). Each type of lens addresses specific vision problems, making it crucial to use the appropriate corrective lens for each condition to ensure optimal vision correction. The correct answer is [D] Spectacles with bifocal lenses are given for the treatment of astigmatism. This statement is false.
What is used in biology laboratories to see the magnified images of microscopic cells or organisms?
In biology laboratories, compound microscopes are essential for viewing magnified images of microscopic cells or organisms. Therefore the correct answer is compound microscope [D]. These microscopes employ multiple lenses to magnify specimens, enabling scientists to study intricate biological structRead more
In biology laboratories, compound microscopes are essential for viewing magnified images of microscopic cells or organisms. Therefore the correct answer is compound microscope [D]. These microscopes employ multiple lenses to magnify specimens, enabling scientists to study intricate biological structures and processes that are otherwise invisible to the naked eye. Compound microscopes utilize a combination of objective and eyepiece lenses to achieve high magnification and resolution. This setup allows researchers to observe cellular organelles, microorganisms, and other minute structures with precision. Option A, a photo camera, is used for capturing images rather than direct observation. A simple microscope (option B) uses a single lens and is limited in magnification compared to a compound microscope. Option D, a telescope, is designed for viewing distant objects and is not suitable for magnifying microscopic specimens. Therefore, the compound microscope (option C) stands out as the primary tool used in biology laboratories for examining and studying microscopic life and cellular structures.
See lessWhat does a watchmaker use to see the fine parts of a watch?
A watchmaker relies on a magnifying lens to see the fine details of a watch's components ; option [B]. This tool is crucial for magnifying small parts like gears, springs, and screws, enabling precise inspection and intricate repair work. Unlike a compound microscope (option C), which is designed foRead more
A watchmaker relies on a magnifying lens to see the fine details of a watch’s components ; option [B]. This tool is crucial for magnifying small parts like gears, springs, and screws, enabling precise inspection and intricate repair work. Unlike a compound microscope (option C), which is designed for viewing microscopic objects with high magnification, a magnifying lens provides sufficient enlargement for detailed examination of watch parts without requiring such extreme magnification. Option A, a photo camera, is used for capturing images rather than for direct visual inspection. Option D, a telescope, is designed for viewing distant objects and would not be suitable for examining close-up details of a watch. Therefore, a magnifying lens (option B) is the most appropriate tool for a watchmaker to accurately work on the delicate mechanisms within a watch.
See lessWhat is a telescope?
A telescope is an optical instrument designed to observe distant objects by collecting and focusing light. It typically uses lenses or mirrors (or both) to gather and magnify the incoming light from distant objects, making them appear larger and clearer than they would to the naked eye; option [A].Read more
A telescope is an optical instrument designed to observe distant objects by collecting and focusing light. It typically uses lenses or mirrors (or both) to gather and magnify the incoming light from distant objects, making them appear larger and clearer than they would to the naked eye; option [A]. Telescopes are crucial tools in astronomy, allowing astronomers to study celestial objects such as stars, planets, galaxies, and nebulae in detail. They can also be used for terrestrial observation, such as in surveillance or birdwatching. Telescopes come in various types, including refracting telescopes that use lenses to bend light and reflecting telescopes that use mirrors to reflect and focus light. Option A suggests seeing distant objects, which aligns with the purpose of telescopes. Options B and C are unrelated to the function of telescopes, and option D dismisses any connection to the correct function of a telescope.
See lessLumen is the unit of
Lumen is a unit used to measure luminous flux, which represents the total amount of visible light emitted by a light source per unit of time. The correct answer is [A] luminous flux. Luminous flux quantifies the brightness of light as perceived by the human eye, regardless of the direction in whichRead more
Lumen is a unit used to measure luminous flux, which represents the total amount of visible light emitted by a light source per unit of time. The correct answer is [A] luminous flux. Luminous flux quantifies the brightness of light as perceived by the human eye, regardless of the direction in which the light is emitted. It is crucial in determining the light output of light bulbs, LED lamps, and other light sources, providing a standardized measure of their brightness. Luminous intensity (option B) measures the brightness of a light source in a specific direction and is expressed in candelas (cd). Illuminance (option C) measures the amount of light incident on a surface per unit area and is expressed in lux (lx). Brightness (option D) is a subjective term referring to the perceived intensity of light, which can vary based on individual perception and environmental factors.
See lessA person suffering from a distance of less than 1 meter is suffering from
Nearsightedness, also known as myopia, is a common vision condition where a person can see objects clearly at close range but has difficulty seeing objects that are farther away. The correct answer is [A] Nearsightedness. This is because the eye focuses light rays in front of the retina rather thanRead more
Nearsightedness, also known as myopia, is a common vision condition where a person can see objects clearly at close range but has difficulty seeing objects that are farther away. The correct answer is [A] Nearsightedness. This is because the eye focuses light rays in front of the retina rather than directly on its surface. Myopia occurs when the eyeball is too long or the cornea has too much curvature. As a result, individuals with myopia may struggle to see objects beyond a certain distance, such as those more than 1 meter away. This condition can be corrected with the use of concave lenses in eyeglasses or contact lenses, which help to diverge the light rays entering the eye, shifting the focal point back onto the retina. Farsightedness (hyperopia) affects near vision, while a disease of the talus pertains to issues with a bone in the ankle and is unrelated to vision problems.
See lessDue to which vision defect a person is unable to see an object more than 10 meters away. Suffering from?
Myopia, commonly known as nearsightedness, is a vision defect where distant objects appear blurry while close objects can be seen clearly. The correct answer is [C] Myopia. This condition occurs because the eye focuses light in front of the retina rather than directly on it. The eyeball may be too lRead more
Myopia, commonly known as nearsightedness, is a vision defect where distant objects appear blurry while close objects can be seen clearly. The correct answer is [C] Myopia. This condition occurs because the eye focuses light in front of the retina rather than directly on it. The eyeball may be too long, or the cornea may have too much curvature, leading to improper focusing of light. As a result, a person with myopia has difficulty seeing objects that are far away, such as those beyond 10 meters. This vision defect can be corrected with concave lenses, which diverge light rays before they enter the eye, allowing the focal point to move back onto the retina for clear vision. Hypermetropia (farsightedness) affects near vision, hydrophobia is a fear of water, and cataracts cause clouding of the eye’s lens, affecting overall vision clarity but not specifically distance vision.
See lessHypermetropia means
Hypermetropia, also known as hyperopia, is a vision condition where distant objects are seen more clearly than near objects. The correct answer is [B] Farsightedness. This occurs because the eye focuses light behind the retina rather than directly on it. The eye may be too short, or the cornea may hRead more
Hypermetropia, also known as hyperopia, is a vision condition where distant objects are seen more clearly than near objects. The correct answer is [B] Farsightedness. This occurs because the eye focuses light behind the retina rather than directly on it. The eye may be too short, or the cornea may have too little curvature, resulting in improper focusing. This causes near objects to appear blurry while distant objects remain in clear focus. Hypermetropia can be corrected using convex lenses, which converge light rays before they enter the eye, moving the focal point forward onto the retina. This adjustment allows for clear vision of nearby objects. Unlike nearsightedness (myopia), which affects distance vision, hypermetropia specifically impacts close-up vision. Presbyopia, another vision condition related to aging, also affects near vision but is distinct from hypermetropia. Warm blood is unrelated to vision and refers to an organism’s ability to regulate its body temperature independently of the environment.
See lessWhat is meant by myopia?
Myopia, commonly referred to as nearsightedness, is a vision condition in which close objects appear clear, but distant objects are blurry. The correct answer is [B] Nearsightedness. This occurs when the eye's shape causes light rays to focus at a point in front of the retina rather than directly onRead more
Myopia, commonly referred to as nearsightedness, is a vision condition in which close objects appear clear, but distant objects are blurry. The correct answer is [B] Nearsightedness. This occurs when the eye’s shape causes light rays to focus at a point in front of the retina rather than directly on its surface. The eyeball may be too long, or the cornea may have too much curvature. This improper focusing prevents light from being correctly interpreted by the brain, resulting in a blurred image of distant objects. Myopia can be corrected using concave lenses, which diverge light rays before they enter the eye, moving the focal point back onto the retina. Corrective measures include eyeglasses, contact lenses, or refractive surgery. Unlike farsightedness (hyperopia), where the difficulty lies in seeing close objects, myopia specifically affects distance vision. Color blindness and night blindness are unrelated conditions affecting color perception and low-light vision, respectively.
See lessTo prevent farsightedness, we use
Farsightedness, also known as hyperopia, is a common vision condition where distant objects are seen more clearly than near ones because the eye focuses light behind the retina rather than directly on it. The correct answer is [C] Convex lens. To correct this condition, convex lenses are used. ConveRead more
Farsightedness, also known as hyperopia, is a common vision condition where distant objects are seen more clearly than near ones because the eye focuses light behind the retina rather than directly on it. The correct answer is [C] Convex lens. To correct this condition, convex lenses are used. Convex lenses, also known as converging lenses, have a shape that is thicker at the center and thinner at the edges. They work by converging light rays before they enter the eye, helping to shift the focal point forward so that it falls directly on the retina. This adjustment allows individuals with hyperopia to see nearby objects more clearly. Convex lenses are commonly used in eyeglasses and contact lenses prescribed for people with farsightedness. Concave lenses, convex mirrors, and concave mirrors are not suitable for correcting farsightedness, as they have different optical properties and are used for different purposes in vision correction and optics.
See lessWhich of the following statement is false?
Bifocal lenses are specifically designed to correct presbyopia, a condition common in older adults where the eyes lose their ability to focus on close objects. Bifocal lenses have two distinct optical powers to aid in viewing both near and distant objects. On the other hand, astigmatism, which causeRead more
Bifocal lenses are specifically designed to correct presbyopia, a condition common in older adults where the eyes lose their ability to focus on close objects. Bifocal lenses have two distinct optical powers to aid in viewing both near and distant objects. On the other hand, astigmatism, which causes blurred vision due to the irregular shape of the cornea or lens, is corrected using cylindrical lenses. These lenses are designed to compensate for the uneven curvature of the eye and provide clear vision at all distances. Concave lenses are prescribed for nearsightedness (myopia), while convex lenses are used for farsightedness (hyperopia). Each type of lens addresses specific vision problems, making it crucial to use the appropriate corrective lens for each condition to ensure optimal vision correction. The correct answer is [D] Spectacles with bifocal lenses are given for the treatment of astigmatism. This statement is false.
See less