When a biconvex lens of glass of refractive index 1.6 was dipped in a certain transparent liquid…
When a biconvex lens of glass of refractive index 1.6 was dipped in a certain transparent liquid, it was found to behave like a plane sheet of glass.
So, the refractive index of the liquid is:
- (a)1.0
- (b)1.4
- (c)1.5
- (d)1.6
Answer
Answer
AIWritten by AI - it can contain mistakes.
Correct option: (d)
Answer: (d) 1.6
A lens behaves like a plane glass sheet ($f = \infty$) when its refractive index equals that of the surrounding liquid ($\mu_l = \mu_g$). Therefore, $\mu_l = 1.6$.
From ISC 2026 Physics Paper 1, question 1(A)(vi).