Question

a 5 cm tall object is placed at a distance of 20 cm from a concave mirror of focal length 30 centimetre use mirror formula to determine the position and size of the image formed ​

Answer 1

your answer is in the picture

Answer 2

Explanation:

(h) of the object = 5cm

(u) object distance= -30cm

(f) focal length = -20cm

using mirror formula:-

mirror formula = 1/f = 1/v = 1/u

1/v = 1/20 - 1/30

1/v = 3-2/60

v = 60cm

(m) magnification = v/u

m = h/5

60/-30=h/5

(h) = -10 cm