Question

If incident ray is along with the principal axis for a concave lens, what will happen?​

Answer 1

Answer:

the incident rays will diverge from the optical center and it's imaginary line will extend backward and meet at focus

Explanation:

Answer 2

Answer:

When a ray of light is incident on a concave mirror along its principal axis then it will pass undeviated and hence the angle of reflection is zero.

Explanation:

When a ray of light is incident on a concave mirror along its principal axis then it will pass undeviated and hence the angle of reflection is zero.