Question

find the position nature and size of the image of an object 4 cm high placed at a distance of 10 cm from a concave mirror of focal length 20cm

Answer 1

Ho=4 u=-10 f=-20.

1/f=1/v+1/u

1/-20=1/v-1/10

1/v=-1/20+1/10

=-1+2/20

V=20

m=-v/u

-20/-10

=2

Magnified/enlarged, virtual and erect

Answer 2

the above answer is right my friend