Question

An unpolarized ray of light is incident on a glass surface at polarising angle of ${57.5}^{\circ }$, then the angle between the incident ray and refracted ray is,

• A. ${57.5}^{\circ }$
• B. ${115}^{\circ }$
• C. ${205}^{\circ }$
• D. ${145}^{\circ }$

Answer 1

The correct option is C ${205}^{\circ }$

When a ray of light is incident on a surface at the polarizing angle, the angle between reflected ray and refracted ray is ${90}^{\circ }$.

We know that angle of incidence and angle of reflection are equal.


So the angle between incident ray and refracted ray is,$={57.5}^{\circ }+{57.5}^{\circ }+{90}^{\circ }={205}^{\circ }$.

Hence, $\left(C\right)$ is the correct answer.