The bending of light from the core (edge) of a barrier is called diffraction, which corresponds to option [B]. Diffraction occurs when a wave encounters an obstacle or a slit that is comparable in size to its wavelength, causing the wave to bend around the edges and spread out. This phenomenon is aRead more
The bending of light from the core (edge) of a barrier is called diffraction, which corresponds to option [B]. Diffraction occurs when a wave encounters an obstacle or a slit that is comparable in size to its wavelength, causing the wave to bend around the edges and spread out. This phenomenon is a fundamental aspect of wave behavior and can be observed with various types of waves, including light and sound. In the context of light, diffraction can create patterns of constructive and destructive interference, leading to effects such as the rainbow-like colors seen in a CD or the spreading of light when it passes through a small aperture. Unlike dispersion, refraction, and interference, diffraction specifically describes the bending and spreading of waves around obstacles.
Polarization, option [B], does not occur in both light and sound. Light waves can be polarized because they are transverse waves, meaning their oscillations are perpendicular to the direction of wave propagation. This property allows light waves to oscillate in various planes and thus be filtered orRead more
Polarization, option [B], does not occur in both light and sound. Light waves can be polarized because they are transverse waves, meaning their oscillations are perpendicular to the direction of wave propagation. This property allows light waves to oscillate in various planes and thus be filtered or aligned in a specific orientation, which is what polarization refers to. On the other hand, sound waves are longitudinal waves, with oscillations occurring in the same direction as the wave propagation. This intrinsic nature of sound waves does not permit polarization because there is no perpendicular oscillation plane to align or filter. While both light and sound waves can experience diffraction, reflection, and refraction, which involve the bending of waves around obstacles, bouncing off surfaces, and changing direction when entering a different medium respectively, the unique transverse nature of light waves and longitudinal nature of sound waves means that polarization is not a shared phenomenon between them.
A lunar eclipse occurs on a full moon day, which corresponds to option [B]. During this celestial event, the Earth passes directly between the Sun and the Moon, with the three bodies aligning in a straight line. The Earth's shadow then falls on the Moon, causing it to darken temporarily. The type ofRead more
A lunar eclipse occurs on a full moon day, which corresponds to option [B]. During this celestial event, the Earth passes directly between the Sun and the Moon, with the three bodies aligning in a straight line. The Earth’s shadow then falls on the Moon, causing it to darken temporarily. The type of lunar eclipse—whether partial, total, or penumbral—depends on how deeply the Moon enters the Earth’s shadow. A total lunar eclipse occurs when the Moon passes completely through the Earth’s umbra (the central, darkest part of the shadow), while a partial lunar eclipse occurs when only a part of the Moon enters the umbra. A penumbral lunar eclipse occurs when the Moon passes through the Earth’s penumbral shadow, resulting in a subtle darkening of the lunar surface. Observing lunar eclipses provides valuable insights into Earth’s position in relation to the Sun and Moon and offers a breathtaking display of celestial mechanics visible from Earth.
To a person sitting and hanging in water, their leg appears bent and smaller due to refraction, which corresponds to option [A]. Refraction happens because light travels at different speeds in water compared to air. When light rays pass from water into air at an angle, such as when viewing a submergRead more
To a person sitting and hanging in water, their leg appears bent and smaller due to refraction, which corresponds to option [A]. Refraction happens because light travels at different speeds in water compared to air. When light rays pass from water into air at an angle, such as when viewing a submerged object from above the water’s surface, they change direction due to the change in the medium’s optical density. This bending effect alters the apparent position and size of objects seen through the water, creating optical illusions. Objects partially submerged appear bent at the water’s surface, a phenomenon often observed in swimming pools or underwater photography. Understanding refraction is crucial in fields like optics, underwater exploration, and ophthalmology, where accurate knowledge of light’s behavior in different environments is essential for interpreting visual information and designing optical instruments.
A coin placed in a vessel filled with water appears slightly raised due to the refraction of light, which corresponds to option [B]. Refraction occurs because light travels at different speeds in different mediums, such as water and air. When light passes from water into air (or vice versa), its patRead more
A coin placed in a vessel filled with water appears slightly raised due to the refraction of light, which corresponds to option [B]. Refraction occurs because light travels at different speeds in different mediums, such as water and air. When light passes from water into air (or vice versa), its path bends at the interface due to the change in speed, following Snell’s law. This bending effect causes the coin to appear higher than its actual position when viewed from above the water’s surface. The amount of apparent displacement depends on the refractive indices of water and air and the angle at which the observer views the coin. This phenomenon is a common optical illusion that demonstrates how light behaves when it transitions between materials with different optical densities. Understanding refraction is essential in fields such as optics, astronomy, and underwater exploration, where accurate predictions of light’s behavior in various mediums are critical for scientific observations and practical applications.
A cut diamond sparkles due to total internal reflection, which corresponds to option [C]. The geometric arrangement of a diamond's facets, combined with its high refractive index, allows light entering the diamond to bounce internally from facet to facet rather than escaping. This phenomenon, knownRead more
A cut diamond sparkles due to total internal reflection, which corresponds to option [C]. The geometric arrangement of a diamond’s facets, combined with its high refractive index, allows light entering the diamond to bounce internally from facet to facet rather than escaping. This phenomenon, known as total internal reflection, ensures that a significant portion of light remains trapped within the diamond, enhancing its brilliance and dispersion of colors. The precise cutting of diamonds into facets optimizes this effect, scattering light into a spectrum of colors called “fire.” This inherent property of diamonds, stemming from their crystalline structure and high refractive index, distinguishes them as prized gemstones renowned for their exceptional sparkle and optical allure. Understanding the physics of light interaction within diamonds is crucial for gemologists and jewelers in evaluating and appreciating their beauty and value.
A solar eclipse occurs on a new moon day (Pratipada), which corresponds to option [A]. During this celestial event, the Moon moves directly between the Sun and Earth, aligning in such a way that its shadow falls on Earth's surface. This alignment blocks all or part of the Sun's light, creating a temRead more
A solar eclipse occurs on a new moon day (Pratipada), which corresponds to option [A]. During this celestial event, the Moon moves directly between the Sun and Earth, aligning in such a way that its shadow falls on Earth’s surface. This alignment blocks all or part of the Sun’s light, creating a temporary darkening of the sky during the day. Solar eclipses can be total, partial, or annular, depending on the alignment and distances between the Sun, Moon, and Earth. A total solar eclipse occurs when the Moon completely covers the Sun’s disk, a partial solar eclipse occurs when only part of the Sun is obscured, and an annular solar eclipse occurs when the Moon is too far from Earth to completely cover the Sun, leaving a ring (annulus) of sunlight visible around the Moon’s edges. Solar eclipses are dramatic astronomical events that occur periodically as the Moon orbits Earth and aligns with the Sun in its orbit.
A cricket player catches a fast-moving ball by pulling his hand back primarily because it may require applying less force (C). By doing so, the player extends the duration of contact with the ball, which reduces the impact force on the hand. This technique allows for better control and absorption ofRead more
A cricket player catches a fast-moving ball by pulling his hand back primarily because it may require applying less force (C). By doing so, the player extends the duration of contact with the ball, which reduces the impact force on the hand. This technique allows for better control and absorption of the ball’s momentum, increasing the likelihood of a successful catch. Additionally, pulling the hand back enables the player to cushion the impact more effectively, minimizing the risk of injury. This method also facilitates adjustments in hand positioning to intercept the ball’s trajectory accurately. Moreover, by reducing the rebound effect, the player can secure the catch more reliably. Overall, pulling the hand back is a strategic approach that enhances catching proficiency, contributes to team performance, and reduces the chance of mishaps during intense gameplay.
Force is the product of mass and acceleration (B). Newton's second law of motion states that force equals mass times acceleration (F = ma). This law describes how the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. In simpler tRead more
Force is the product of mass and acceleration (B). Newton’s second law of motion states that force equals mass times acceleration (F = ma). This law describes how the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. In simpler terms, the greater the mass of an object and the greater the acceleration applied to it, the greater the force exerted. Velocity is the rate of change of displacement, while weight is the force exerted on an object due to gravity. However, force is specifically determined by the mass of an object and the rate at which its velocity changes, which is represented by acceleration. Therefore, the correct option is mass and acceleration (B).
When a person lands on the Moon, there is a change in weight (C). Weight is the force exerted on an object due to gravity, and since the Moon has less gravity than Earth, the person's weight decreases. However, their mass remains unchanged. Mass is a measure of the amount of matter in an object, andRead more
When a person lands on the Moon, there is a change in weight (C). Weight is the force exerted on an object due to gravity, and since the Moon has less gravity than Earth, the person’s weight decreases. However, their mass remains unchanged. Mass is a measure of the amount of matter in an object, and it remains constant regardless of the gravitational field. Therefore, while the person experiences a decrease in weight due to the weaker gravitational pull of the Moon, their mass remains the same as it was on Earth. This change in weight occurs because weight is directly proportional to the gravitational acceleration experienced by the person, which is significantly less on the Moon compared to Earth.
The bending of light from the core (edge) of a barrier is called
The bending of light from the core (edge) of a barrier is called diffraction, which corresponds to option [B]. Diffraction occurs when a wave encounters an obstacle or a slit that is comparable in size to its wavelength, causing the wave to bend around the edges and spread out. This phenomenon is aRead more
The bending of light from the core (edge) of a barrier is called diffraction, which corresponds to option [B]. Diffraction occurs when a wave encounters an obstacle or a slit that is comparable in size to its wavelength, causing the wave to bend around the edges and spread out. This phenomenon is a fundamental aspect of wave behavior and can be observed with various types of waves, including light and sound. In the context of light, diffraction can create patterns of constructive and destructive interference, leading to effects such as the rainbow-like colors seen in a CD or the spreading of light when it passes through a small aperture. Unlike dispersion, refraction, and interference, diffraction specifically describes the bending and spreading of waves around obstacles.
See lessWhich of the following phenomena does not occur in both light and sound?
Polarization, option [B], does not occur in both light and sound. Light waves can be polarized because they are transverse waves, meaning their oscillations are perpendicular to the direction of wave propagation. This property allows light waves to oscillate in various planes and thus be filtered orRead more
Polarization, option [B], does not occur in both light and sound. Light waves can be polarized because they are transverse waves, meaning their oscillations are perpendicular to the direction of wave propagation. This property allows light waves to oscillate in various planes and thus be filtered or aligned in a specific orientation, which is what polarization refers to. On the other hand, sound waves are longitudinal waves, with oscillations occurring in the same direction as the wave propagation. This intrinsic nature of sound waves does not permit polarization because there is no perpendicular oscillation plane to align or filter. While both light and sound waves can experience diffraction, reflection, and refraction, which involve the bending of waves around obstacles, bouncing off surfaces, and changing direction when entering a different medium respectively, the unique transverse nature of light waves and longitudinal nature of sound waves means that polarization is not a shared phenomenon between them.
See lessLunar eclipse occurs on
A lunar eclipse occurs on a full moon day, which corresponds to option [B]. During this celestial event, the Earth passes directly between the Sun and the Moon, with the three bodies aligning in a straight line. The Earth's shadow then falls on the Moon, causing it to darken temporarily. The type ofRead more
A lunar eclipse occurs on a full moon day, which corresponds to option [B]. During this celestial event, the Earth passes directly between the Sun and the Moon, with the three bodies aligning in a straight line. The Earth’s shadow then falls on the Moon, causing it to darken temporarily. The type of lunar eclipse—whether partial, total, or penumbral—depends on how deeply the Moon enters the Earth’s shadow. A total lunar eclipse occurs when the Moon passes completely through the Earth’s umbra (the central, darkest part of the shadow), while a partial lunar eclipse occurs when only a part of the Moon enters the umbra. A penumbral lunar eclipse occurs when the Moon passes through the Earth’s penumbral shadow, resulting in a subtle darkening of the lunar surface. Observing lunar eclipses provides valuable insights into Earth’s position in relation to the Sun and Moon and offers a breathtaking display of celestial mechanics visible from Earth.
See lessTo a person sitting hanging in water, his leg appears bent and small
To a person sitting and hanging in water, their leg appears bent and smaller due to refraction, which corresponds to option [A]. Refraction happens because light travels at different speeds in water compared to air. When light rays pass from water into air at an angle, such as when viewing a submergRead more
To a person sitting and hanging in water, their leg appears bent and smaller due to refraction, which corresponds to option [A]. Refraction happens because light travels at different speeds in water compared to air. When light rays pass from water into air at an angle, such as when viewing a submerged object from above the water’s surface, they change direction due to the change in the medium’s optical density. This bending effect alters the apparent position and size of objects seen through the water, creating optical illusions. Objects partially submerged appear bent at the water’s surface, a phenomenon often observed in swimming pools or underwater photography. Understanding refraction is crucial in fields like optics, underwater exploration, and ophthalmology, where accurate knowledge of light’s behavior in different environments is essential for interpreting visual information and designing optical instruments.
See lessWhy does a coin placed in a vessel filled with water appear slightly raised?
A coin placed in a vessel filled with water appears slightly raised due to the refraction of light, which corresponds to option [B]. Refraction occurs because light travels at different speeds in different mediums, such as water and air. When light passes from water into air (or vice versa), its patRead more
A coin placed in a vessel filled with water appears slightly raised due to the refraction of light, which corresponds to option [B]. Refraction occurs because light travels at different speeds in different mediums, such as water and air. When light passes from water into air (or vice versa), its path bends at the interface due to the change in speed, following Snell’s law. This bending effect causes the coin to appear higher than its actual position when viewed from above the water’s surface. The amount of apparent displacement depends on the refractive indices of water and air and the angle at which the observer views the coin. This phenomenon is a common optical illusion that demonstrates how light behaves when it transitions between materials with different optical densities. Understanding refraction is essential in fields such as optics, astronomy, and underwater exploration, where accurate predictions of light’s behavior in various mediums are critical for scientific observations and practical applications.
See lessWhy does a cut diamond sparkle?
A cut diamond sparkles due to total internal reflection, which corresponds to option [C]. The geometric arrangement of a diamond's facets, combined with its high refractive index, allows light entering the diamond to bounce internally from facet to facet rather than escaping. This phenomenon, knownRead more
A cut diamond sparkles due to total internal reflection, which corresponds to option [C]. The geometric arrangement of a diamond’s facets, combined with its high refractive index, allows light entering the diamond to bounce internally from facet to facet rather than escaping. This phenomenon, known as total internal reflection, ensures that a significant portion of light remains trapped within the diamond, enhancing its brilliance and dispersion of colors. The precise cutting of diamonds into facets optimizes this effect, scattering light into a spectrum of colors called “fire.” This inherent property of diamonds, stemming from their crystalline structure and high refractive index, distinguishes them as prized gemstones renowned for their exceptional sparkle and optical allure. Understanding the physics of light interaction within diamonds is crucial for gemologists and jewelers in evaluating and appreciating their beauty and value.
See lessWhen does solar eclipse occur on?
A solar eclipse occurs on a new moon day (Pratipada), which corresponds to option [A]. During this celestial event, the Moon moves directly between the Sun and Earth, aligning in such a way that its shadow falls on Earth's surface. This alignment blocks all or part of the Sun's light, creating a temRead more
A solar eclipse occurs on a new moon day (Pratipada), which corresponds to option [A]. During this celestial event, the Moon moves directly between the Sun and Earth, aligning in such a way that its shadow falls on Earth’s surface. This alignment blocks all or part of the Sun’s light, creating a temporary darkening of the sky during the day. Solar eclipses can be total, partial, or annular, depending on the alignment and distances between the Sun, Moon, and Earth. A total solar eclipse occurs when the Moon completely covers the Sun’s disk, a partial solar eclipse occurs when only part of the Sun is obscured, and an annular solar eclipse occurs when the Moon is too far from Earth to completely cover the Sun, leaving a ring (annulus) of sunlight visible around the Moon’s edges. Solar eclipses are dramatic astronomical events that occur periodically as the Moon orbits Earth and aligns with the Sun in its orbit.
See lessWhy does a cricket player catch a fast-moving ball by pulling his hand back?
A cricket player catches a fast-moving ball by pulling his hand back primarily because it may require applying less force (C). By doing so, the player extends the duration of contact with the ball, which reduces the impact force on the hand. This technique allows for better control and absorption ofRead more
A cricket player catches a fast-moving ball by pulling his hand back primarily because it may require applying less force (C). By doing so, the player extends the duration of contact with the ball, which reduces the impact force on the hand. This technique allows for better control and absorption of the ball’s momentum, increasing the likelihood of a successful catch. Additionally, pulling the hand back enables the player to cushion the impact more effectively, minimizing the risk of injury. This method also facilitates adjustments in hand positioning to intercept the ball’s trajectory accurately. Moreover, by reducing the rebound effect, the player can secure the catch more reliably. Overall, pulling the hand back is a strategic approach that enhances catching proficiency, contributes to team performance, and reduces the chance of mishaps during intense gameplay.
See lessForce is the product of
Force is the product of mass and acceleration (B). Newton's second law of motion states that force equals mass times acceleration (F = ma). This law describes how the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. In simpler tRead more
Force is the product of mass and acceleration (B). Newton’s second law of motion states that force equals mass times acceleration (F = ma). This law describes how the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. In simpler terms, the greater the mass of an object and the greater the acceleration applied to it, the greater the force exerted. Velocity is the rate of change of displacement, while weight is the force exerted on an object due to gravity. However, force is specifically determined by the mass of an object and the rate at which its velocity changes, which is represented by acceleration. Therefore, the correct option is mass and acceleration (B).
See lessWhen a person lands on the Moon, in his body
When a person lands on the Moon, there is a change in weight (C). Weight is the force exerted on an object due to gravity, and since the Moon has less gravity than Earth, the person's weight decreases. However, their mass remains unchanged. Mass is a measure of the amount of matter in an object, andRead more
When a person lands on the Moon, there is a change in weight (C). Weight is the force exerted on an object due to gravity, and since the Moon has less gravity than Earth, the person’s weight decreases. However, their mass remains unchanged. Mass is a measure of the amount of matter in an object, and it remains constant regardless of the gravitational field. Therefore, while the person experiences a decrease in weight due to the weaker gravitational pull of the Moon, their mass remains the same as it was on Earth. This change in weight occurs because weight is directly proportional to the gravitational acceleration experienced by the person, which is significantly less on the Moon compared to Earth.
See less