(11%) Problem 5: Suppose a polarizing filter reduces the intensity of polarized

Question

(11%) Problem 5: Suppose a polarizing filter reduces the intensity of polarized light to 65 % of its original value. By how much is the magnetic field of the electromagnetic radiation reduced? Give your answer in terms of a ratio of the magnetic field of the polarized light Bp to the incident magnetic field Bo Grade Summary Deductions Potential 0% 100% tan() | | ( Submissions Attempts remaining: 7 (0% per attempt) detailed view cotan0 asin) acos0 tanh0 cotanh0 0 END Degrees O Radians to BACKSPACE DEL CLEAR Submit Hint I give up! Hints: 2% deduction per hint. Hints remaining: 2 Feedback: 2% deduction per feedback

Explanation / Answer

Here ,

as intensity is proporational to B^2

where B is the amplitude of magnetic field

when I = 0.65 * Io

B/Bo = sqrt(I/Io)

B/Bo = sqrt(0.65)

B = 0.81 * Bo

the amplitude of magnetic field Bp is 0.81 * Bo

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