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K.V Basti On-Line Test
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Q-1 Main cause of refraction is-
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Q-2 sin i / sin r = n this relationship known as
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Q-3 Refractive index of glass with respect to air is 3/2. Refractive index of air with respect to glass will be-
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Q-4 When light goes from rarer to denser medium
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Q-5 Which lens is known as Diverging lens-
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Q-6 An object is placed at 2F in front of a convex lens. Position & nature of the image will be-
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Q-7 Lens formula is-
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Q-8 Unit of power of lens is-
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Q-9 Focal length of a concave lens is 2 m. Its power will be-
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Q-10 Power of two lense are + 10 D & - 2.5 D. The power of combination of these two lenses will be-