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  • A light wave is incident from air to a medium with a refractive index of 1.5. If the angle of incidence is 45 degrees, what is the angle of refraction?Option: 1<

A light wave is incident from air to a medium with a refractive index of 1.5. If the angle of incidence is 45 degrees, what is the angle of refraction?

Option: 1

30 degrees


Option: 2

45 degrees


Option: 3

60 degrees


Option: 4

75 degrees


Answers (1)

best_answer

We know that

\frac{\sin (i)}{\sin (r)}=\frac{n _2}{n_ 1},

where n1 is the refractive index of air (approximately 1) and n2 is the refractive index of the medium (1.5 in this case).

Substituting values,

 \sin (r)=\frac{1}{1.5} \times \sin (45)=\sin \left ( r \right )= 0.47.

Taking the inverse sine, we get the angle of refraction as 30 degrees.

Posted by

SANGALDEEP SINGH

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