A ray of light enters a rectangular glass slab at angle θ1 = 45° and emerges at an angle θ2, as shown below. If refractive index of glass slab is root 2 then sin theta 2 is
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Explanation:
apply snell's law
u1.sini=u2.sinr
u1=1
i=45°
1× sin45°= √2×sin r
sinr=1/2
r=30°
sin theta 2=1/2
theta=30°
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