Question 141: Waves Optics

Question

A polarizer - analyser set is adjusted such that the intensity of light coming out of the analyser is just 10% of the original intensity. Assuming that the polarizer - analyser set does not absorb any light, the angle by which the analyser need to be rotated further to reduce the output intensity to be
zero, is :

Accepted Answer

I = I
0
cos
2
$$	heta $$
$$ \Rightarrow $$ $${{{I_0}} \over {10}}$$ = I
0
cos
2
$$	heta $$
$$ \Rightarrow $$ cos $$	heta $$ = $${1 \over {\sqrt {10} }}$$
$$ \Rightarrow $$ $$	heta $$ = 71.6
o
$$ 	herefore $$ $$\phi $$ = 90 - 71.6 = 18.4
o

Answer

71.6o

Answer

90o

Answer

18.4o

Answer

45o

Waves Optics

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