First slide

Dispersion

Question

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

Moderate

A

0.0276
B

0.276
C

2.76
D

0.106

Solution

$ω = \frac{μ_{F} - μ_{C}}{(μ_{D} - 1)} = \frac{(1 .6333 - 1 .6161)}{(1 .622 - 1)} = 0 .0276$

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