The first woman to climb the highest mountain peak, Mt. Everest, was Junko Tabei from Japan. She achieved this historic feat on May 16, 1975, as part of a Japanese Women's Everest Expedition. Despite facing significant challenges, including an avalanche that buried her and her team, Tabei perseveredRead more
The first woman to climb the highest mountain peak, Mt. Everest, was Junko Tabei from Japan. She achieved this historic feat on May 16, 1975, as part of a Japanese Women’s Everest Expedition. Despite facing significant challenges, including an avalanche that buried her and her team, Tabei persevered to reach the summit. Her remarkable accomplishment not only marked a milestone in mountaineering but also broke barriers for women in the sport. Tabei’s achievement continues to inspire and encourage women worldwide to pursue their dreams in adventure and exploration.
The first Indian woman to climb the highest mountain peak, Mt. Everest, was Bachendri Pal. She reached the summit on May 23, 1984, as part of the India Everest Expedition. Despite facing numerous challenges, including a near-death experience due to an avalanche, Pal persevered and successfully complRead more
The first Indian woman to climb the highest mountain peak, Mt. Everest, was Bachendri Pal. She reached the summit on May 23, 1984, as part of the India Everest Expedition. Despite facing numerous challenges, including a near-death experience due to an avalanche, Pal persevered and successfully completed her climb. Her remarkable achievement has not only made her a national hero but also inspired countless Indians, especially women, to take up mountaineering and other adventure sports. Pal’s accomplishment remains a significant milestone in the history of Indian mountaineering.
The first man to climb the highest mountain peak, Mt. Everest, was Sir Edmund Hillary from New Zealand. He, along with Tenzing Norgay, a Sherpa of Nepal, successfully reached the summit on May 29, 1953. Their expedition was part of a British-led team. This historic ascent marked a significant milestRead more
The first man to climb the highest mountain peak, Mt. Everest, was Sir Edmund Hillary from New Zealand. He, along with Tenzing Norgay, a Sherpa of Nepal, successfully reached the summit on May 29, 1953. Their expedition was part of a British-led team. This historic ascent marked a significant milestone in mountaineering, showcasing human determination and the spirit of exploration. Their achievement has inspired countless climbers and remains a celebrated moment in the history of adventure and exploration.
The elevation of land is measured from sea level, which is taken as zero. Methods include altimeters, which use air pressure variations to gauge elevation, and GPS devices, which calculate elevation from satellite data. Traditional surveying techniques involve instruments like theodolites to measureRead more
The elevation of land is measured from sea level, which is taken as zero. Methods include altimeters, which use air pressure variations to gauge elevation, and GPS devices, which calculate elevation from satellite data. Traditional surveying techniques involve instruments like theodolites to measure angles and distances from a known reference point. These methods determine the height above sea level, providing accurate elevation data essential for mapping, construction, and scientific research, ensuring precision in understanding and utilizing the Earth’s topography.
The biosphere is the global sum of all ecosystems, encompassing every living organism and their interactions with the atmosphere, lithosphere, and hydrosphere. It includes diverse habitats such as forests, oceans, deserts, and tundras, each teeming with unique life forms. The biosphere supports andRead more
The biosphere is the global sum of all ecosystems, encompassing every living organism and their interactions with the atmosphere, lithosphere, and hydrosphere. It includes diverse habitats such as forests, oceans, deserts, and tundras, each teeming with unique life forms. The biosphere supports and sustains life through complex biological processes, nutrient cycles, and energy flows. These interactions regulate the environment, influencing climate, soil fertility, and the availability of resources. The biosphere’s intricate web of life highlights the interdependence of organisms and their surroundings, emphasizing the importance of biodiversity and ecosystem health for the planet’s sustainability.
The hydrosphere includes all of Earth's water, found in oceans, rivers, lakes, glaciers, groundwater, and the atmosphere. This vast and dynamic system regulates the planet's climate, supports diverse ecosystems, and is essential for all forms of life. Water cycles continuously through the hydrospherRead more
The hydrosphere includes all of Earth’s water, found in oceans, rivers, lakes, glaciers, groundwater, and the atmosphere. This vast and dynamic system regulates the planet’s climate, supports diverse ecosystems, and is essential for all forms of life. Water cycles continuously through the hydrosphere, interacting with the atmosphere, lithosphere, and biosphere. It influences weather patterns, shapes landscapes through erosion and deposition, and is vital for various biological and chemical processes. The hydrosphere’s intricate connections with other Earth systems underscore its importance in maintaining environmental balance and supporting life on our planet.
The atmosphere is a vital layer of gases encircling the Earth, primarily composed of nitrogen (78%), oxygen (21%), and trace gases like argon and carbon dioxide. It plays a crucial role in regulating the planet's temperature, weather, and climate, creating conditions suitable for life. The atmospherRead more
The atmosphere is a vital layer of gases encircling the Earth, primarily composed of nitrogen (78%), oxygen (21%), and trace gases like argon and carbon dioxide. It plays a crucial role in regulating the planet’s temperature, weather, and climate, creating conditions suitable for life. The atmosphere acts as a protective shield against harmful solar radiation and facilitates essential processes such as respiration and photosynthesis. Divided into five main layers—troposphere, stratosphere, mesosphere, thermosphere, and exosphere—the atmosphere supports diverse ecosystems and influences various natural phenomena, from weather patterns to climate change, making it indispensable for sustaining life on Earth.
A concave lens, also known as a diverging lens, spreads out light rays that pass through it. The correct answer is [B] Virtual image. This divergence causes the light rays to appear as though they are originating from a single point on the same side of the lens as the object. Hence, the image formedRead more
A concave lens, also known as a diverging lens, spreads out light rays that pass through it. The correct answer is [B] Virtual image. This divergence causes the light rays to appear as though they are originating from a single point on the same side of the lens as the object. Hence, the image formed is virtual, meaning it cannot be projected onto a screen. Additionally, the virtual image is upright and smaller compared to the actual object. Unlike a convex lens, which can produce both real and virtual images depending on the object’s position, a concave lens consistently produces a virtual image regardless of the object’s distance from the lens. This fundamental characteristic of concave lenses is utilized in various optical devices such as eyeglasses for correcting nearsightedness and certain types of cameras.
Nearsightedness, or myopia, is a common vision condition where distant objects appear blurry while close objects can be seen clearly. The correct answer is [B] Concave. This occurs because the eye's shape causes light rays to focus at a point in front of the retina rather than directly on its surfacRead more
Nearsightedness, or myopia, is a common vision condition where distant objects appear blurry while close objects can be seen clearly. The correct answer is [B] Concave. This occurs because the eye’s shape causes light rays to focus at a point in front of the retina rather than directly on its surface. A concave lens, being a diverging lens, spreads out the light rays before they enter the eye. This divergence effectively moves the focal point back onto the retina, allowing for clearer vision of distant objects. Concave lenses are thinner at the center and thicker at the edges, which helps to diverge the incoming light appropriately. This corrective measure is crucial in eyeglasses or contact lenses prescribed for individuals with myopia, helping them see distant objects more clearly and reducing the strain on their eyes. Convex lenses, on the other hand, are used to correct farsightedness, not nearsightedness.
When a person enters a dark room from a bright light area, they experience impaired vision initially because their eyes are adapted to the bright light. The correct answer is [D] Adaptation of the eyes to darkness over some time. In bright light, the pupils constrict and rhodopsin (a light-sensitiveRead more
When a person enters a dark room from a bright light area, they experience impaired vision initially because their eyes are adapted to the bright light. The correct answer is [D] Adaptation of the eyes to darkness over some time. In bright light, the pupils constrict and rhodopsin (a light-sensitive pigment) in the retina becomes bleached. As the person moves into darkness, the pupils dilate to allow more light to enter the eyes, and rhodopsin begins to regenerate, a process known as dark adaptation. This adaptation involves the eyes becoming more sensitive to low light conditions over time, allowing the person to gradually see better in the dark room. Option A, change in the size of the pupil, and option B, change in the diameter and focal length of the lens, are mechanisms related to adjusting to different light intensities but do not explain the gradual improvement in vision in darkness. Option C, decolorization and restaining of rhodopsin, is not a recognized physiological process; instead, rhodopsin regeneration occurs. Therefore, the reason a person gradually starts seeing better in a dark room after entering from a bright area is due to the adaptation of their eyes to darkness over some time (option D).
Who was Junko Tabei?
The first woman to climb the highest mountain peak, Mt. Everest, was Junko Tabei from Japan. She achieved this historic feat on May 16, 1975, as part of a Japanese Women's Everest Expedition. Despite facing significant challenges, including an avalanche that buried her and her team, Tabei perseveredRead more
The first woman to climb the highest mountain peak, Mt. Everest, was Junko Tabei from Japan. She achieved this historic feat on May 16, 1975, as part of a Japanese Women’s Everest Expedition. Despite facing significant challenges, including an avalanche that buried her and her team, Tabei persevered to reach the summit. Her remarkable accomplishment not only marked a milestone in mountaineering but also broke barriers for women in the sport. Tabei’s achievement continues to inspire and encourage women worldwide to pursue their dreams in adventure and exploration.
See lessWho is the first Indian woman to climb the highest mountain peak of Mt. Everest?
The first Indian woman to climb the highest mountain peak, Mt. Everest, was Bachendri Pal. She reached the summit on May 23, 1984, as part of the India Everest Expedition. Despite facing numerous challenges, including a near-death experience due to an avalanche, Pal persevered and successfully complRead more
The first Indian woman to climb the highest mountain peak, Mt. Everest, was Bachendri Pal. She reached the summit on May 23, 1984, as part of the India Everest Expedition. Despite facing numerous challenges, including a near-death experience due to an avalanche, Pal persevered and successfully completed her climb. Her remarkable achievement has not only made her a national hero but also inspired countless Indians, especially women, to take up mountaineering and other adventure sports. Pal’s accomplishment remains a significant milestone in the history of Indian mountaineering.
See lessWho is the first man to climb the highest mountain peak Mt. Everest?
The first man to climb the highest mountain peak, Mt. Everest, was Sir Edmund Hillary from New Zealand. He, along with Tenzing Norgay, a Sherpa of Nepal, successfully reached the summit on May 29, 1953. Their expedition was part of a British-led team. This historic ascent marked a significant milestRead more
The first man to climb the highest mountain peak, Mt. Everest, was Sir Edmund Hillary from New Zealand. He, along with Tenzing Norgay, a Sherpa of Nepal, successfully reached the summit on May 29, 1953. Their expedition was part of a British-led team. This historic ascent marked a significant milestone in mountaineering, showcasing human determination and the spirit of exploration. Their achievement has inspired countless climbers and remains a celebrated moment in the history of adventure and exploration.
See lessHow is the elevation of the land measured?
The elevation of land is measured from sea level, which is taken as zero. Methods include altimeters, which use air pressure variations to gauge elevation, and GPS devices, which calculate elevation from satellite data. Traditional surveying techniques involve instruments like theodolites to measureRead more
The elevation of land is measured from sea level, which is taken as zero. Methods include altimeters, which use air pressure variations to gauge elevation, and GPS devices, which calculate elevation from satellite data. Traditional surveying techniques involve instruments like theodolites to measure angles and distances from a known reference point. These methods determine the height above sea level, providing accurate elevation data essential for mapping, construction, and scientific research, ensuring precision in understanding and utilizing the Earth’s topography.
See lessWhat do you mean by Biosphere?
The biosphere is the global sum of all ecosystems, encompassing every living organism and their interactions with the atmosphere, lithosphere, and hydrosphere. It includes diverse habitats such as forests, oceans, deserts, and tundras, each teeming with unique life forms. The biosphere supports andRead more
The biosphere is the global sum of all ecosystems, encompassing every living organism and their interactions with the atmosphere, lithosphere, and hydrosphere. It includes diverse habitats such as forests, oceans, deserts, and tundras, each teeming with unique life forms. The biosphere supports and sustains life through complex biological processes, nutrient cycles, and energy flows. These interactions regulate the environment, influencing climate, soil fertility, and the availability of resources. The biosphere’s intricate web of life highlights the interdependence of organisms and their surroundings, emphasizing the importance of biodiversity and ecosystem health for the planet’s sustainability.
See lessWhat do you mean by Hydrosphere?
The hydrosphere includes all of Earth's water, found in oceans, rivers, lakes, glaciers, groundwater, and the atmosphere. This vast and dynamic system regulates the planet's climate, supports diverse ecosystems, and is essential for all forms of life. Water cycles continuously through the hydrospherRead more
The hydrosphere includes all of Earth’s water, found in oceans, rivers, lakes, glaciers, groundwater, and the atmosphere. This vast and dynamic system regulates the planet’s climate, supports diverse ecosystems, and is essential for all forms of life. Water cycles continuously through the hydrosphere, interacting with the atmosphere, lithosphere, and biosphere. It influences weather patterns, shapes landscapes through erosion and deposition, and is vital for various biological and chemical processes. The hydrosphere’s intricate connections with other Earth systems underscore its importance in maintaining environmental balance and supporting life on our planet.
See lessWhat do you mean by Atmosphere?
The atmosphere is a vital layer of gases encircling the Earth, primarily composed of nitrogen (78%), oxygen (21%), and trace gases like argon and carbon dioxide. It plays a crucial role in regulating the planet's temperature, weather, and climate, creating conditions suitable for life. The atmospherRead more
The atmosphere is a vital layer of gases encircling the Earth, primarily composed of nitrogen (78%), oxygen (21%), and trace gases like argon and carbon dioxide. It plays a crucial role in regulating the planet’s temperature, weather, and climate, creating conditions suitable for life. The atmosphere acts as a protective shield against harmful solar radiation and facilitates essential processes such as respiration and photosynthesis. Divided into five main layers—troposphere, stratosphere, mesosphere, thermosphere, and exosphere—the atmosphere supports diverse ecosystems and influences various natural phenomena, from weather patterns to climate change, making it indispensable for sustaining life on Earth.
See lessWhat type of image does a concave lens always form?
A concave lens, also known as a diverging lens, spreads out light rays that pass through it. The correct answer is [B] Virtual image. This divergence causes the light rays to appear as though they are originating from a single point on the same side of the lens as the object. Hence, the image formedRead more
A concave lens, also known as a diverging lens, spreads out light rays that pass through it. The correct answer is [B] Virtual image. This divergence causes the light rays to appear as though they are originating from a single point on the same side of the lens as the object. Hence, the image formed is virtual, meaning it cannot be projected onto a screen. Additionally, the virtual image is upright and smaller compared to the actual object. Unlike a convex lens, which can produce both real and virtual images depending on the object’s position, a concave lens consistently produces a virtual image regardless of the object’s distance from the lens. This fundamental characteristic of concave lenses is utilized in various optical devices such as eyeglasses for correcting nearsightedness and certain types of cameras.
See lessWhich of the following lenses is used to correct near sightedness?
Nearsightedness, or myopia, is a common vision condition where distant objects appear blurry while close objects can be seen clearly. The correct answer is [B] Concave. This occurs because the eye's shape causes light rays to focus at a point in front of the retina rather than directly on its surfacRead more
Nearsightedness, or myopia, is a common vision condition where distant objects appear blurry while close objects can be seen clearly. The correct answer is [B] Concave. This occurs because the eye’s shape causes light rays to focus at a point in front of the retina rather than directly on its surface. A concave lens, being a diverging lens, spreads out the light rays before they enter the eye. This divergence effectively moves the focal point back onto the retina, allowing for clearer vision of distant objects. Concave lenses are thinner at the center and thicker at the edges, which helps to diverge the incoming light appropriately. This corrective measure is crucial in eyeglasses or contact lenses prescribed for individuals with myopia, helping them see distant objects more clearly and reducing the strain on their eyes. Convex lenses, on the other hand, are used to correct farsightedness, not nearsightedness.
See lessWhen a person enters a dark room from a bright light area, so he does not see clearly for some time, but later gradually he starts seeing things. The reason for this is
When a person enters a dark room from a bright light area, they experience impaired vision initially because their eyes are adapted to the bright light. The correct answer is [D] Adaptation of the eyes to darkness over some time. In bright light, the pupils constrict and rhodopsin (a light-sensitiveRead more
When a person enters a dark room from a bright light area, they experience impaired vision initially because their eyes are adapted to the bright light. The correct answer is [D] Adaptation of the eyes to darkness over some time. In bright light, the pupils constrict and rhodopsin (a light-sensitive pigment) in the retina becomes bleached. As the person moves into darkness, the pupils dilate to allow more light to enter the eyes, and rhodopsin begins to regenerate, a process known as dark adaptation. This adaptation involves the eyes becoming more sensitive to low light conditions over time, allowing the person to gradually see better in the dark room. Option A, change in the size of the pupil, and option B, change in the diameter and focal length of the lens, are mechanisms related to adjusting to different light intensities but do not explain the gradual improvement in vision in darkness. Option C, decolorization and restaining of rhodopsin, is not a recognized physiological process; instead, rhodopsin regeneration occurs. Therefore, the reason a person gradually starts seeing better in a dark room after entering from a bright area is due to the adaptation of their eyes to darkness over some time (option D).
See less