Section 4 The above diagram represents a series of polarizers (six are shown, bu

Question

Section 4 The above diagram represents a series of polarizers (six are shown, but it could be fewer or more), each rotated through the same angle ·N. 22..with respect to the previous polarizer. Initially unpolarized light shines from the left. How many polarizers are necessary to get the final intensity of the light emerging on the right to be under 1/100 (that is, 1%) of the initial intensity of the unpolarized light? Answer: polarizers (a) (b) How many polarizers are necessary to get the final intensity of the light emerging on the right to be under 1/1000 (that is, 0.1%) of the initial intensity of the unpolarized light? Answer: -polarizers

Explanation / Answer

Let the number of polariser are n

After 1st polarisor

Intensity=I/2

After n-1 polarisor ,intensity

i=(I/2)(cos(22.2)*cos(22.2))^(n-1)

i=I/100

We got n=26

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