Refraction of light by the earth’s atmosphere due to variation in air density is called
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Myopia and hypermetropia can be corrected by
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The air layer of atmosphere whose temperature is less then the hot layer behave as optically
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When white light enters a prism, it gets split into its constituent colours. This is due to
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The image formed on the retina of the human eye is
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The defective eye of a person has near point 0.5 m and point 3 m. The power far corrective lens required for
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Bi-focal lens are required to correct
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The ability of eye lens to adjust its focal length to form a sharp image of the object at varying distances on the retina is called
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The defect of vision in which the person is able to see distant object distinctly but cannot see nearby objects clearly is called
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Near and far points of a young person normal eye respectively are
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Having two eyes facilitates in
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The muscular diaphragm that controls the size of the pupil is
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