Question

If an object is placed at a distance of 10 cm in front of a concave mirror of focal length 4 cm, find the position and characteristics of the image formed. Also, find the magnification.

Answer 1

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Given:

Focal length of concave mirror, f = -4 cm

Distance of object from the mirror, u = -10 cm

use formula, 1/v + 1/u = 1/f

or, 1/v = 1/f - 1/u

or, 1/v = 1/-4 - 1/-10

or, 1/v = -1/4 + 1/10 = -3/20

or, v = -0.15cm

hence, image position is the 0.15cm left side from the pole of the concave mirror.

The image is virtual and erect.

Answer 2

ABOVE ANSWER IS CORRECT..!!