Question

Find the size, nature and position of image formed when an object of size 1cm is placed at a distance of 54 cm from a concave mirror of focal length 36cm.

Answer 1

size = -2cm
nature = real, inverted and magnified
position = - 108 cm

Answer 2

h= 1cm
u= -54cm
F= -36cm

we know
1/f = 1/u + 1/v
1/v =1/f-1/u
1/v = 1/-36 + 1/54
1/v =- 3+2/108
v= -108cm


Also magnification of mirror
h'/h = -v/u
h' = -(-108)/-54
h' =-2cm

Size of image=-2cm
Nature of image= real and inverted
position= below principal axix