Question

4.
What is the position of the image when an object is placed at a distance of
20 cm from a concave mirror of focal length 20 cm?​

Answer 1

Answer:

given,

u=-20

f=-20

v=?

1/f=1/v+1/u

1/v=1/u-1/f

=1/-20-1/-20

=0/20

=0v=0