Q.

The refractive index of flint glass for blue F line is 1.6333 and red C line is 1.6161. If the refractive index for yellow D line is 1.622, the dispersive power of the glass is

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a

0.0276

b

0.276

c

2.76

d

0.106

answer is A.

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Detailed Solution

ω=μF−μCμD−1=(1.6333−1.6161)(1.622−1)=0.0276
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The refractive index of flint glass for blue F line is 1.6333 and red C line is 1.6161. If the refractive index for yellow D line is 1.622, the dispersive power of the glass is