MHT-CET

Ray Optics question bank (Physics)

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Q1.

A ray of light travels from a denser medium to a rarer medium. The reflected and the refracted rays are perpendicular to each other. If $r$ and $r'$ are angles of reflection and refraction respectively, then the angle of incidence $i$ is equal to $[\,C$ = critical angle $]$

(A)

$\sin^{-1}(\tan C)$

(B)

$\tan^{-1}(\sin r)$

(C)

$\tan^{-1}(\sin C)$

(D)

$\sin^{-1}(\tan r')$

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Q2.

Three beams of blue, green and orange colour are made to pass separately through a prism . In the position of minimum deviation, the angle of refraction will be (the angle of prism is $60^\circ$)

(A)

$30^\circ$ for blue , green and orange colour

(B)

$30^\circ$ only for blue colour

(C)

$30^\circ$ only for green colour

(D)

$30^\circ$ only for orange colour

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