Question

A concave mirror of focal length 15cm form an image 30 cm from the mirror.How far is the object placed from the mirror?Draw the ray diagram? According to class 10...​

Answer 1

Answer:

given that,

a concave mirror

f=-15cm

v=-30cm

u=?

1/v + 1/u = 1/f

1/u = 1/f - 1/v

1/u = v-f/f×v

u = f×v/v-f

u = (-15)×(-30)/(-30)-(-15)

u= 450/ (-15)

u= -30 cm

hence, we can say that the object is placed at the centre of curvature (C) and the image is formed at centre of curvature but the image formed will be inverted and real.

f=15cm

c=30cm

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