Optics Question 567

Question: In the visible region of the spectrum the rotation of the place of polarization is given by θ=a+bλ2 . The optical rotation produced by a particular material is found to be 30° per mm at λ=5000 Å and 50° per mm at λ=4000\AA . The value of constant a will be

Options:

A) +509 per mm

B) 509 per mm

C) +950 per mm

D) 950 per mm

Show Answer

Answer:

Correct Answer: B

Solution:

θ=a+bλ2

30=a+b(5000)2 and 50=a+b(4000)2 .

Solving for a, we get a=509permm



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