Define the following terms in the contest of a diverging lens:

Question :Define the following terms in the contest of a diverging lens:

(i) Principal focus,
(ii) Focal length.

The correct answer is -In the context of a diverging lens:

(i) Principal focus: It is the point on the principal axis of a diverging lens where parallel rays of light appear to diverge from after passing through the lens. It is denoted by ‘F’.

(ii) Focal length: It is the distance between the optical centre of a diverging lens and its principal focus. It is denoted by ‘f’.