A thin hollow prism of refracting angle 3°, filled with water gives a deviation of 1°. The refractive index of water is

Options

A. 1.59
B. 1.33
C. 1.46
D. 1.51

Answer

B

Explanation

Angle of deviation of the light ray produced by prism is,
`delta=A(mu-1)`
where, `delta` = angle of deviation
A = angle of prims and
μ = refractive index of the prism
Given , A = 3°, `delta` =1° and μ=?
Substituting the given values in Eq. (i), we get
`f^(@)=3^(@)(mu-1)!mu=4/3=1.33`
Hence, the refractive index of the prism is 1.33.