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CHETAN PUBLICATION-LENSES-Choose and write the correct option:
- What is the distance of distinct vision?
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- The power of a convex lens of focal length 50 cm is …………….
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- The focal length of a concave lens with power -4D is ……………….
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- If the incident ray passes through focus, then the reflected ray is ……...
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- The image is formed on the ………..of the human eye.
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- If an object is placed between F(1)" and " 2F(1) of a convex lens, the...
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- When a person is myopia, he/she can clearly see .
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- Hypermeteropia is corrected by lens.
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- Convex lens of power +5" D " and concave lens with power -3" D "are pl...
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- Simple microscope consists of
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- The perception of dim light is concerned with …………….. cells.
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- Impression of an image lasts on the retina for1/10 the of a second.
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- The second focal point is located at ………………… of a human eye.
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- For a Convex lens, if the incident ray is parallel to the principle ax...
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- Inside water, an air bubble behaves ……………….
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- To obtain an image of the same size as the object with the help of a c...
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- At what distance should a watchmaker hold his lens from the watch?
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- When we enter a dark room, pupil of our eye ………………. .
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