Ray Optics Curved Surface Refraction(11th And 12th > Physics ) Questions and Answers
Explanation:-
Answer: Option D. -> 15 cm:
D
Image will be formed at infinity if object is placed at focus of the lens i.e., at 20 cm from thelens. Hence,
Shift = 25−20=(1−1μ)t
or 5=(1−11.5)t
or t=5×1.50.5=15 cm