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Question : 11
Total: 13
SECTION - C
A ray of light is refracted by a glass prism. Obtain an expression for the refractive index of the glass in terms of the angle of prism
Solution: 👈: Video Solution
A ray is refracted by a glass prism.
Angle of deviation= δ = i 1 + i 2 + A
Angle of prism= A = r 1 + r 2
For minimum deviation,
i 1 = i 2 and r 1 = r 2
∴ δ min = 2 i 1 − A
∴ i 1 =
Also, A = 2 r 1
∴ r 1 =
∴ Refractive index = µ
=
=
Angle of deviation
Angle of prism
For minimum deviation,
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