Incorrect Incorrect Question 11 of 12 ncorrect Map deb pling A beam of initially

Question

Incorrect Incorrect Question 11 of 12 ncorrect Map deb pling A beam of initially unpolarized light passes through a sequence of three ideal polarizers. The angle between the axes of the first and second polarizers is 19.3°, and the angle between the axes of the second and third polarizers is 50.5 What is the ratio of the intensity of light emerging from the third polarizer, 13, to the intensity of light incident on the first polarizer, lo? Number 19.3 o 0.891 50.5 o O Previous Check Answer Next Ext Hint

Explanation / Answer

This question will be solved by Law of Malus i.e I=I0.cos2?

So, for first polarizer Intensity I1=I0.cos2?= I0.                       here ?=0 hence cos0=1.

for second polarizer Intensity I2=I1.cos2?                        here ?=19.3 hence cos19.3=0.943

                                               I2=I0*(0.943)2=0.89.I0

for third polarizer Intensity I3=I2.cos2?                       here ?=50.5hence cos50.5=0.636

                                          I3=0.89I0*(0.636)2

                                                        I3=0.36.I0

                                     Hence I3/I0=0.36.                              Ans.

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