Question

a concave mirror of focal length 10 centimetres is placed at a distance 35 cm from a wall how far from the wall should an object be placed so that its real image is formed on the wall?​

Answer 1

Answer:

We have given =

F= - 10 , v = -35 and we have find u

By mirror formula 1/f = 1/v+1/u

1/-10=1/-35+1/u

1/u=1/35 - 1/10

Take lcm

1/u= -2+7/-70

U = 5/-70

U = -14 cm

So obeject Is placed at between c and f

So it produce image at. 35 cm on wall