A) 10 cm
B) 5 cm
C) 20 cm
D) 15 cm
Correct Answer: D
Solution :
[d] Image will be formed at infinity if object is placed at focus of the lens, i.e., at 20 cm from the lens. Hence, Shift = 25 - 20\[=\left( 1-\frac{1}{\mu } \right)\mu \] Or \[5=\left( 1-\frac{1}{1.5} \right)t\]or \[t=\frac{5\times 1.5}{0.5}=15cm\]You need to login to perform this action.
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