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Question
A concave lens made of material of refractive index of n1 is kept in medium of refractive index n2. A parallel beam of light is incident on the lens. Complete the path of rays of light emerging from the concave lens if,
A concave lens made of material of refractive index of n1 is kept in medium of refractive index n2. A parallel beam of light is incident on the lens. Complete the path of rays of light emerging from the concave lens if,
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Solution
The correct option is A n1 > n2
In this case, n1>n2, i.e, medium of concave lens is denser than the medium from where light ray is incident on it.Therefore , at entering surface, the light ray bends towards the normal n1, while leaving the lens, the ray again goes under refraction at leaving surface and in this situation it bends away from the normal n2.∴ Option A is correct.
In this case, n1>n2, i.e, medium of concave lens is denser than the medium from where light ray is incident on it.
Therefore , at entering surface, the light ray bends towards the normal n1, while leaving the lens, the ray again goes under refraction at leaving surface and in this situation it bends away from the normal n2.
∴ Option A is correct.
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