A white light is incident at 20 0 on a material of silicate flint glass slab as shown. µ voilet = 1.66 and µ r = 1.6. For what value of d will the separation be 1 mm in red and violet rays.
A
cm
B
cm
C
5 cm
D
cm
Text Solution
Verified by ExpertsThe correct answer is:
B
sin r 1 = 
= 
or r 1 = 34 0 30'
sin r 2 = 
= 
or r 2 = 36 0 Using y = 
y 1 – y 2 = d 
0.1 = d 
or 0.1 = d 
= d[0.71 – 0.68]
or d = 
= 
cm.
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