In the visible region of the spectrum the rotation of the place of polarization is given by 
. The optical rotation produced by a particular material is found to be 30° per mm at 
Å and 50° per mm at 
. The value of constant a will be
A
per mm
B
per mm
C
per mm
D
per mm
Text Solution
Verified by ExpertsThe correct answer is:
B
and 
Solving for a, we get 
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