Question

aswer the following questions in 80-120 words.
(1 x 5 = 5 marks)
) (a) An object is placed on the principal axis of a convex lens at a distance of 24 cm
from it. If the focal length of the lens is 15 cm, what is the position of the image?
(b) State the relative size and nature of the image formed. Draw a ray diagram to
support your answer. 160
(c) Find the power of the lens.
Please only find power of the lens ​

Answer 1

Answer:

Correct option is

D

30 cm

u=v for plane mirror =40 cm

v=20 cm for convex mirror as well since the images coincide and distance between the two mirrors is 20 cm.

u for convex mirror =−60 cm (since it is left of the mirror)

From lens formula,

f

1

=

u

1

+

v

1

=−

60

1

+

20

1

f

1

=

60

2

f=30cm