Question

AN OBJECT OF HEIGHT 10 CM IS KEPT AT A DISTANCE OF 150 CM IN FRONT OF CONCAVE MIRRORHAVING RADIUS OF CURVATURE 2M. WHAT IS NATURE, HEIGHT AND DISTANCE OF IMAGE FROM MIRROR?

Answer 1

Answer:

Object distance u=−10 cm

Radius of curvature of concave mirror R=−15 cm

Thus its focal length f=

2

R

=−

2

15

cm

Using mirror formula :

v

1

+

u

1

=

f

1

∴

v

1

+

−10

1

=−

15

2

⟹ v=−30 cm

Magnification m=

u

−v

∴ m=

−10

−(−30)

=−3

Negative sign indicates that the image formed is inverted in nature.

Magnitude of magnification is greater than 1 which indicates that magnified image is formed.