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