The focal length of a concave mirror is 30 cm . Find the position of the object in front of the mirror so that the image is three times the size of the object.
f= -30 cm m= 3
U = ? V= v cm
?
?
Thus the object should placed 20 cm from the front of mirror.
U = ? V= v cm
?
?
Thus the object should placed 20 cm from the front of mirror.