Question

A convex lens of focal length 15 cm forma an image 10 cm from the lens. How far is the object placed form the lens? Draw the ray diagram.

Answer 1

Answer:

The F

distance of object from les= -30 cm

Answer 2

Explanation:

f = +15cm (as convex lens are there)

v = +10cm

1/v - 1/u = 1/f

1/v - 1/f = 1/u

1/10 - 1/15 = 1/u

3-2/30 = 1/u

1/30 =1/u

hence , 30cm= u.