light obliquely travelled from glass to air critical angle is 42°.angle of incidence is 42°.Find its angle of refraction
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Explanation:
Snell's law states that ratio of sine of angle of incidence to sine of angle of refraction is a constant. This constant is called the refractive index of the medium. Hence:
n ga
= sinr
/sinr
= sin42
/sin 42°.
= 42°./42°.
=0
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