Question

Page No
Date
of right
object
Eticed 2m is
Blaced at
distance 20 am
in front of
concave Mirror whose
Jadius
Cuovitare is can find the paction,
Nicare
Size of lig
of de​

Answer 1

Answer:

Focal length

f=−20cm

h

i

=3h

o

The image is three times the size of the object. So there are two cases.

Case 1. For real image

m=−

u

v

=−3

v=3u

Using mirror’s formula

f

1

=

v

1

+

u

1

−20

1

=

3u

1

+

u

1

u=

3

−80

cm

Case 2. For virtual image

m=

u

−v

=+3

v=−3u

Again using mirror’s formula

−20

1

=

−3u

1

+

u

1

u=

3

−40

cm

The possible values of u are

3

−80

cmand

3

−40

cm.

Answer 2

1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0