Question

The distance of the object from the pole of the mirror is 35cm.its focal length of concave mirror is 10cm .find the location of the image.

Answer 1

U = -35 cm {concave mirror}

F = - 10 cm{concave mirror}

Mirror formula :

1/f. = 1/u +1/v

1/-10 = 1/-35 + 1/v

1/v = 1/-10 +1/35

1/v = 1/10 - 1/35

Taking LCM

1/v = 7-2/70

1/v = 5/70

V = 70/5

V = 14 cm

Answer 2

The distance between the pole P of the concave mirror and the focus F is the focal length of the concave mirror. Thus, the focal length of a concave mirror can be estimated by obtaining a 'Real image' of a distant object at its focus, as shown in the figure.