Optics Question 90

Question: A ray of light is incident at the glass?water interface at an angle i, it emerges finally parallel to the surface of water, then the value of μg would be

[IIT-JEE (Screening) 2003]

Options:

A) (4/3) sin i

B) 1/sin i

C) 4/3

D) 1

Show Answer

Answer:

Correct Answer: B

Solution:

For glass-water interface gμw=sinisinr -(i) For water-air interface wμa=sinrsin90o -(ii)

gμw×wμa=sinisinr×sinrsin90o=sini

μwμg×μaμw=siniμg=1sini



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