For a particular flint glass the polarising angle for yellow light ( ) is

PHYSICS · Single correct · ISC · Physics · Optics · Optics

Problem

For a particular flint glass the polarising angle for yellow light (

\lambda = 589\,\text{nm}

) is

57.0^{\circ}

. For blue light (

\lambda = 450\,\text{nm}

) it is

58.5^{\circ}

. Assuming the refractive index follows Cauchy’s formula

\mu(\lambda)=A + \dfrac{B}{\lambda^{2}}

with

\lambda

\mu\text{m}

, determine the value of the constant

B

(in

\mu\text{m}^{2}

). (a)

0.090

(b)

0.045

(c)

0.030

(d)

0.015