Q.17 a ray of light travelling inside a rectangular glass block of refractive index is incident on the glass-air surface at an angle of incidence of 60. Under these conditions, the ray
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Angle of incidence =60°
Refractive index of glass =3/2
According to snells law
sini/sinr=refractive index
sin60°/sinr=3/2
as sin60°=root3/2
root3/2×2/3=sinr
1/root3 =sin
Explanation:
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