Question 43: Waves Optics

Question

An unpolarised beam of intensity I$$_0$$ is incident on a pair of nicols making an angle of 60$$^\circ$$ with each other. The intensity of light emerging from the pair is

Accepted Answer

Since, the incidence light beam is unpolarised, the intensity of light on being transmitted through first nicol polaroid, will become
$$I=\frac{I_0}{2}$$
So, according to law of Malus, intensity on passing through second nicol will be
$$I' = I{\cos ^2}	heta  = {{{I_0}} \over 2}{\cos ^2}60\Upsilon  = {{{I_0}} \over 2} 	imes {\left( {{1 \over 2}} ight)^2} = {{{I_0}} \over 8}$$

Answer

$$I_0$$

Answer

$$\frac{I_0}{4}$$

Answer

$$\frac{I_0}{2}$$

Answer

$$\frac{I_0}{8}$$

Waves Optics

An unpolarised beam of intensity I$_0 is incident on a pair of nicols making an angle of 60^\circ$ with each other. The intensity of light emerging from the pair is

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