Two converging lens have focal length 20 cm & 30 cm. Optical axis of both lens coincide. This lens system is used to form an image of an object. It turn out that size of the image does not depend on the distance between the lens system & the object. If L is distance between lens & M is magnification after all possible refraction-
A
L = 10 cm
B
L = 50 cm
C
| M | = 
D
| M | = 
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(b, d)
Calculate M net , as a function of x,
Then 
= 0
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