1.

An object is placed at a distance of 36 cm from a concave mirror of focal length 20 cm. find image distance​

Answer»

ANSWER:

OBJECT distance u=−36 cm

Focal length of concave MIRROR f=−12 cm

Using mirror formula :

v

1

+

u

1

=

f

1

Or

v

1

+

−36

1

=

−12

1

⟹ v=−18 cm

Magnification

h

o

h

i

=

u

−v

Or

10

h

i

=

−10

−(−18)

⟹ h

i

=−18 cm

Image formed is real and inverted.


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