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10.Wave Optics
medium
A light beam is incident on a denser medium whose refractive index is $1.414$ at an angle of incidence $45^o$ . Find the ratio of width of refracted beam in a medium to the width of the incident beam in air
A
$1: $ $\sqrt {2\;} $
B
$\sqrt 2 :1$
C
$\sqrt 2 :\sqrt {3\;} $
D
$\;\sqrt 3 :\sqrt {2\;} $
(NEET-2017)
Solution
$\cos 30=\frac{x}{\sqrt{2}}$
$x=\sqrt{2} \cdot \frac{\sqrt{3}}{2}$
$x=\frac{\sqrt{3}}{\sqrt{2}}$
$x: y=\sqrt{3}: \sqrt{2}$
Standard 12
Physics
