Question

An object is placed 30cm distance from the concave mirror and image formed
at 12cm from the pole. Find the focal length of the mirror and mention the
characteristics of the image formed.

Answer 1

Answer:

42cm

Explanation:

This can be done using the mirror formula

1/f= 1/v + 1/u

Given..object distance =u = 30cm

Image distance = v= 12 cm

So the focal length of the mirror 'f'

1/f = 1/12 + 1/30

1/f = 1/42

f = 42 cm

The focal length of the mirror is 42 cm.

The characteristics of the image formed are

..Virtual and erect...as the object is placed between the Pole and Focus

..Enlarged..or magnified

..Behind the mirror..as it is not formed due to actual intersection not rays.

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