Question

An object 2cm long placed 40cm in front of a concave mirror of a focal length 15cm find the size of the image and the position of the image

Answer 1

Height of the object=2

U=-40

f=-15

1/f=1/v+1/u

1/-15=1/v+1/-40

1/v-1/40=-1/15

1/v=-1/15+1/40

1/v=-1/8

-v=8

v=-8

m=-v/u

m=-(-8)/-40

m=1/-5=-.2

Diminished,real and inverted