NEET Physics Wave Optics Questions Solved

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=5000Å and 50° per mm at λ=4000Å. The value of constant a will be

(1) +50°9per mm

(2) 50°9per mm

(3) +9°50per mm

(4) 9°50per mm

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