Question

(c) An object 4 cm high is placed at a distance of 6 cm in
concave mirror of focal length 12 cm. Find the position of the​

Answer 1

Solution :-

ho = + 4 cm

u = - 6 cm

f = - 12 cm

As we know that

→ 1/v + 1/u = 1/f

→ 1/v + 1/-6 = 1/-12

→ 1/v - 1/6 = - 1/12

→ 1/v = 1/6 - 1/12

→ 1/v = 2 - 1/12

→ 1/v = 1/12

→ v = + 12 cm

now,

→ hi/ho = - v/u

→ hi/4 = - 12/- 6

→ hi = + 8cm