Question

If the height of the object in the previous problem is
1.2 cm, what will be the height of the image?​

Answer 1

Explanation:

Given :-

h

0

=1.2m

f=−20cm

ν=−60cm

from mirror formula,

v

1

+

u

1

=

f

1

−60

1

+

u

1

=

−20

1

u

1

=

60

1

−

20

1

=

60

−2

u=−30cm

Magnification, m=

u

−v

=

−30

−(−60)

=−2

m=

h

0

h

i

=−2

h

i

=−2×1.2=−2.4m

h

i

=−2.4m