Question

1. An object is kept at a distance of 5 cm in front of a convex mirror of focal length
10 centimeter. Calculate the position and the magnification of the image and state
its nature.​

Answer 1

Answer:

u=-5 cm, f=10 cm

We know that

v

1

+

u

1

=

f

1

⇒

v

1

+

(−5)

1

=

10

1

⇒

v

1

=

20

1

+

5

1

=

10

3

∴v=

3

10

cm=3.33cm

The position of the image is 3.33 cm behind the convex mirror.

Magnification, m=−

u

v

=−

−5

3.33

=0.66

The image is virtual and erect.