A ray of light is incident at the glass–water interface at an angle i, it eme

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

μ_{g}

would be

Options:

A . (43)sini

B . 1sini

C . 43

D . 1

Answer: Option B
:
B
For glass water interface

_{g} μ_{ω} = \frac{s i n i}{s i n r} . . . . . (i)

and For water-air interface

_{ω} μ_{a} = \frac{s i n r}{s i n 90} . . . . . . (i i)

∴_{g} μ_{ω} x_{ω} μ_{a} = s i n i \Rightarrow μ_{g} = \frac{1}{s i n i}

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