The dispersive power of the material of lens of focal length 20 cm is 0.08. The longitudinal chromatic aberration in of the lens is

Question

The dispersive power of the material of lens of focal length 20 cm is 0.08. The longitudinal chromatic aberration in of the lens is (A) 0.08 cm (B) 1.6 cm (C) 0.8 cm (D) 0.16 cm

Tardigrade Admin · Accepted Answer

Here, f=20 cm, w=0.08 Longitudinal chromatic aberration =w f=0.08 × 20=1.6 cm

Q. The dispersive power of the material of lens of focal length $20 c m$ is $0.08$ . The longitudinal chromatic aberration in of the lens is

0.08 cm

1.6 cm

0.8 cm

0.16 cm

Here, $f = 20 c m, w = 0.08$
Longitudinal chromatic aberration
$= w f = 0.08 \times 20 = 1.6 c m$

Q. The dispersive power of the material of lens of focal length 20cm is 0.08. The longitudinal chromatic aberration in of the lens is