Question

If angle of incidence is 30 and refractive index is 1.5 find angle of refraction.

Answer 1

$\mathtt{ \huge{ \fbox{Solution :)}}}$

Given ,

• Angle of incidence = 30
• Refractive index = 1.5

We know that , the sin of angle of incidence to the sin of angle of refraction is called refractive index

$\large \mathtt{ \fbox{Refractive \: index = \frac{Sin \: of \: angle \: of \: incidence}{Sin \: of \: angle \: of \: refraction} }</p><p>}$

Substitute the known values , we obtain

➡1.5 = Sin30/Sin of angle of refraction

➡1.5 = 1/(2 × Sin of angle of refraction)

➡Sin of angle of refraction = 1/(2 × 1.5)

➡Sin of angle of refraction = 10/30

➡Sin of angle of refraction = 1/3

So ,

➡Angle of refraction = Sin^(-1)1/3

Hence , the angle of reflection is sin inverse 1/3

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