Question

An object 2cm is placed 20cm infront of a concave mirror of focal length 10cm .Find the distance at which a screen should be placed to obtain a sharp image .What will be the size and nature of the image formed

Answer 1

1/p+1/q= 1/f

1/20+1/q= 1/10

q=20cm

m=-q/p

m=-20/20= -1

Image is real, inverted, and same size as the obj