Question

draw a ray diagram to show the path of the refracted ray in each of the following cases.A ray of light incident on a concave lens is
1) passing through its optical centre.
2) parallel to its principal axis.
3) directed towards its principal focus.

Answer 1

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Answer 2

Given that,

A ray of light incident on a concave lens.

We need to draw ray diagram

According to given data,

(1). If the ray of light passing through the optical center of the concave lens then the ray will emerge without any deviation.

(2). If the ray of light moves parallel to the principal axis after reflection from a concave lens then the ray appear to diverge from the principal focus on the same side of the lens.

(3). If the ray of light directed towards its principal focus then the ray goes to parallel to its principal axis after refraction through the lens.

Hence, This is the required answer.