Question

An extended object is place at a distance of 25 cm from a convex lens of a focal length 15cm. The image obtain on the screen is

Answer 1

Answer:

u= -25cm

f= +15cm(convex lens)

1/f= 1/v - 1/u

1/15 = 1/v - 1/-25

1/5= 1/v + 1/25

1/v = 1/15 - 1/25

1/v = 2/75

v= 75/2=37.5cm