1. The intensity of the unpolarized light is Io. What is the intensity I after t

Question

1. The intensity of the unpolarized light is Io. What is the intensity I after the light goes through a polaroid with vertical polarizing axis?

(i) I = Io (ii) I = Io/2 (iii) I = Io/ 4 (iv) It is zero. (v) It depends on the frequency of the light.

2. The monochromatic light diffracts on the two slits which are 0.1 mm apart (their size is negligible) and produces an interference pattern on the wall which is 3 m far from the apparatus.

a) The distance between the central bright fringe and the first off-center bright fringe is 2 cm. What is the wavelength of the light? Which color is it?

b) How many bright and dark fringes could we see on the wall?

Explanation / Answer

according to Malus's law

I = Io Cos^2(theta)

theta = 90

I = 0

so intensity of light become zero

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