Question

4. (A) An object at a distance of 30 cm from a concave mirror gets its image at the same point. The focal
length of the mirror is -15cm
(R)When object is placed at 2F, the image formed by concave mirror is also at 2F
o 2F = -30 or F = -15 cm.​

Answer 1

Answer:

here's the answer

Explanation:

a)u=30 cm

R=30 cm

that's why image is formed at same place ie at the centre of curvature and is of same size

b) 2f=radius

so the reason is same

hope it may helps

please mark it as brainliest answer