Question

An object is placed at a distance of 75cm from a screen. two positions of a convex lens of focal length 12 cm placed so as to obtain a real image are

Answer 1

Answer:

Explanation:

v = ?

u= 75 cm

2f= 12cm = 6cm

1/v= 1/u+1/f

= 1/75- 1/6

= 9.73 cm