First slide

Dispersion

Question

If the refractive angles of two prisms made of crown glass are 10° and 20° respectively, then the ratio of their colour deviation powers will be

Moderate

A

1 : 1
B

2 : 1
C

4 : 1
D

1 : 2

Solution

$\frac{δ_{1}}{δ_{2}} = \frac{A_{1}}{A_{2}}$

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