Question 5: Wave Optics

Question

An unpolarised beam of intensity $$2 a^2$$ passes through a thin polaroid. Assuming zero absorption in the polaroid, the intensity of emergent plane polarised light is

Accepted Answer

The intensity of light after passing through an ideal polaroid is given by Malus's Law, which states that the intensity of the plane-polarized light emerging from a polaroid is half the intensity of the unpolarized light incident on it.
The original intensity of the unpolarized light beam is $$2a^2$$. When this beam passes through the polaroid, the intensity of the emergent plane-polarized light is:
$$ I = \frac{1}{2} 	imes 2a^2 = a^2 $$
Thus, the intensity of the emergent plane-polarized light is:
Option B
$$a^2$$

Answer

$$2 a^2$$

Answer

$$a^2$$

Answer

$$\sqrt{2} a^2$$

Answer

$$\frac{a^2}{2}$$

Wave Optics

An unpolarised beam of intensity $2 a^2$ passes through a thin polaroid. Assuming zero absorption in the polaroid, the intensity of emergent plane polarised light is

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