Question

please solve the 4's 2nd and 3rd​

Answer 1

Answer:

1. concave mirror
2. at infinity
3. principal focus

Answer 2

Q. 4.

(ii) c) At infinity

(iii) d) Principal Focus

Explanation:

ii)

because any mirror's centre can't be such far as sun, so the sun will be at infinity.

iii)

Because sun is at infinity, so the light ray converge at the principal focus. (see attachment)

Note :-

This formation only form when object (here sun) is at infinity.

• C = Centre of curvature
• F = Principal Focus

hope it helps.