an equilateral prism is made of glass when a parallel beam of light is incident on the face of the prism the angle of minimum deviation is found to be 40°. calculate the RI of the prism
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Answer:
Given,
Angle of minimum deviation , δ
m
=40 ∘
.
Angle of the prism, A=60 ∘ .
Refractive index of water, μ w =1.33.
Let the refractive index of the material of the prism be μ
g
.
Using the formula,
μ
g
=
Sin(
2
A
)
Sin
2
(A+δ
m
)
we have,
μ
g
=
Sin(
2
60
)
Sin
2
(60+40)
μ
g
=
Sin30
Sin50
=1.532
Explanation:
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