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Question

When light is incident on a 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 second medium 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
The critical angle for the two media is given by sin ic=12
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D
sinic=12
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Solution

The correct option is B Velocity of light in the I medium is 1.73 times the velocity in the II medium
From graph tan30=sinrsini=11μ21μ2=3μ2v2=v1v2=1.73v1=1.75v2
Also from μ=1sinCsinC=1RaverμDensersinC=11μ2=13

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