Question

1* Caluate the focal length of a conver-
ging leng, if an object placed at a
Istance of 60cm fom it fooms a real
image at
at a distance of 30cm.​

Answer 1

hi dear shresta here!!!!

u=-60cm

v=-30cm

1/f=1/v-1/u

1/f=-1/30+1/60

=-2+1/60

f=-60cm is the answer

converging concave mirror