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Question

When light is incident on the surface of medium at angle i and refracted into a second medium at an angle r the graph of sin i vs sin r is as shown in the graph. From this, one can conclude that


A

Velocity of light in the medium II is 1.73 times the velocity of light in the I medium

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B

Velocity of light in the I medium is 1.73 times the velocity in the II medium

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C

Medium II is optically denser than medium I

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D

sin ic=12

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Solution

The correct options are
B

Velocity of light in the I medium is 1.73 times the velocity in the II medium


C

Medium II is optically denser than medium I


From the graph,
tan 30=sin rsin i=1μ21=13

μ21=3μ2μ1=v1v2=1.73

v1=1.73 v2

Also from μ=1sin C

sin C=1μ21=13.


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