Question

the radius of curvature of a concave mirror is 60 cm. find the focal length of this concave mirror. ​

Answer 1

r=-60

f=r/2

f=-30

u=-60

v=?

1/v+1/u=1/f

1/v+1/-60=1/-30

1/v=1/60-1/30

=1-2/60

=-1/60

so

v=-60