cbse XII physics investigatory project-

3.To find the refractive indices of (a)water (b) oil (transparent) using a plane mirror , a equiconvex lens and an adjustable object needle.

refer internet ji.

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The focal length of glass lens (refractive index 1.5) is 20 cm in air what will be it's focal length in liquid of refractive index 5/4
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Use the formula of refraction . You will get two equations ..
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Both hv more refractive indices with respect to air
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Find reflective indexes of water and oil
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Find reflective indexes of water and oil by using plane and equiconvex len
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To find the recractive indicates of water , oil using a plane mirror, a equiconvex lens, and an adjustable object needle
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Okkkk
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Investigatory project on refractive index of water and oil
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