First slide

Ray optics

Question

For crown glass, $μ_{v} = 1.523$ and $μ_{r} = 1.5145$ . Dispersive power crown glass is

Moderate

A

0.928
B

0.0898
C

0.01638
D

0.1842

Solution

$μ_{v} = 1.523, μ_{r} = 1.5145$
$∴ μ_{y} = \frac{1.523 + 1.5145}{2} = 1.51875$
$∴ ω = \frac{μ_{v} - μ_{r}}{μ_{y} - 1} = \frac{(1.523 - 1.5145)}{(1.51875 - 1)} = 0.01638$

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