Question

Question 25. A concave lens of focal length 15 cm form an image of 10cm

from the lens. How far is the object placed from the lens? Draw the
diagram?
(Marks 05)
DADTV.CATA​

Answer 1

Answer:

Object distance = 30 cm

Ray Diagram is attached to it

Explanation:

Lens Formula =

1/v + 1/u = 1/f

-1/10 + 1/u = -1/15

1/u = -1/15 + 1/10

1/u = -10 + 15 \150

u = 150\5

u = 30