Question

A concave mirror of focal length 10cm is
placed at the distance of 35 cm
from wall How
far from the wall should an object placed
to get its image on wall​

Answer 1

answer

21 cm

solutions

f= -10 CM, v= -35 cm

from1/u=1/f-1/v= 1/-10+1/35=1/-14

u=-14 cm

distance of object from wall

35-14= 21 cm