Q. When a lens of refractive index $n_{1}$ is placed in a liquid of refractive index $n_{2}$, the lens looks to be disappeared only, if
A) $n_{1} = n_{2}/2$
B) $n_{1} = 3n_{2}/4$
C) $n_{1} = n_{2}$
D) $n_{1} = 5n_{2}/4$
Explanation
The correct answer is Option C: $n_{1} = n_{2}$.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.