Internal reflection of light is prevented through the
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Twinkling of stars is due to atmospheric
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Function of eyelids includes
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The bluish colour of water in deep sea is due to
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Which of the following phenomena of light are involved in the formation of a rainbow?
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Greatest refraction of light is caused through
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Condition in which image is formed behind retina is called
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The part of the eyes refracts light entering the eye from external objects?
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The light sensitive cell present on retina and is sensitive to the intensity of light is
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Which of the following colors is least scattered by fog, dust of smoke?
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The least distance of distinct vision for a young adult with normal vision is
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The danger signals installed at the top of tall buildings are red in colour. These can be easily seen from a distance because among all other colours, the red light
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