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

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Answer 2

According to the above details, we can take;

Height of an object h = 5 cm

Distance of object u = -20 cm

Focal length f = -30 cm

According to mirror's formula

1/f = 1/v + 1/u

V = 60 cm

The image is formed at 60 cm

The height of the image is

M = h’/h

H’ = 15 cm

The answer to this question is 15cm.