Questions
A slab made of a transparent material, has refractive index . A ray of light is incident on the top face of the slab at on angle of incidence of . Then the minimum value of for which no ray of light will emerge from the lateral surface AB of the block is
detailed solution
Correct option is B
α=(90o-r)The ray QR will not emerge from the face ABif α>θc⇒sinα>sinθc⇒sin(90o-r)>1μ⇒cosr>1μ⇒1-sin2r>1μ⇒1-sin2θμ2>1μ⇒μ>1+sin2θ⇒μmin=1+sin230o=52Talk to our academic expert!
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A vessel is half filled with a liquid of refractive index μ. The other half of the vessel is filled with an immiscible liquid of refractive index 1.5 μ. The apparent depth of vessel is 50% of the actual depth. The value of μ is
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