Question

a ray of light is incident on a glass slab at a polarising angle 58 degree calculate the percentage change in the speed of light in glass

​

Answer 1

Dear Student,

● Answer -

% change in speed of light = 15.17 %

◆ Explanation -

Given that polarising angle is 58°.

n = 1/sinp

n = 1/sin58°

n = 1/0.848

n = 1.179

Speed of light in the glass is -

v = c / n

v = 3×10^8 / 1.179

v = 2.545×10^8 m/s

Percentage change in speed of light is -

% change = (c-v)/c × 100

% change = (3×10^8 - 2.545×10^8) × 100 / (3×10^8)

% change = 15.17 %

Hence, Percentage change in speed of light is 15.17 %.

Thanks dear. Hope this helps you...