Q.

Two transparent media A and B are separated by a plane boundary. The speed of light in those media are1.5 x 108 m/s and 2.0 x 108 m/s, respectively. The critical angle for a ray of light for these two media is:

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a

tan1(0.750)

b

sin1(0.500)

c

sin1(0.750)

d

tan1(0.500)

answer is A.

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Detailed Solution

sinθc=μRμD=VDVR=1.52=0.75θc=sin1(0.75)

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Two transparent media A and B are separated by a plane boundary. The speed of light in those media are1.5 x 108 m/s and 2.0 x 108 m/s, respectively. The critical angle for a ray of light for these two media is: