An unpolarised beam of intensity I0 is incident on a pair of nicol prisms making an angle of 60° with each other. The intensity of light emerging from the pair is -

Question

An unpolarised beam of intensity I0 is incident on a pair of nicol prisms making an angle of 60° with each other. The intensity of light emerging from the pair is - (A) I0 (B) (I0/2) (C) (I0/4) (D) (I0/8)

Tardigrade Admin · Accepted Answer

The intensity of light emerging from the first prism = (I0/2) and intensity of light emerging from the second prism is = (I0/2)cos2 60o=(I0/8) .

Q. An unpolarised beam of intensity $I_{0}$ is incident on a pair of nicol prisms making an angle of $6 0^{\circ}$ with each other. The intensity of light emerging from the pair is -

$I_{0}$

$\frac{I _{0}}{2}$

$\frac{I _{0}}{4}$

$\frac{I _{0}}{8}$

The intensity of light emerging from the first prism = $\frac{I _{0}}{2}$
and intensity of light emerging from the second prism is = $\frac{I _{0}}{2} co s^{2} 6 0^{o} = \frac{I _{0}}{8}$ .

Q. An unpolarised beam of intensity I0​ is incident on a pair of nicol prisms making an angle of 60∘ with each other. The intensity of light emerging from the pair is -

I0​

2I0​​

4I0​​

8I0​​