Question

when lens of refractive index n1is placed ina liquid of refractive index n2 the lens looks to be disappeared only if

Answer 1

n1 and n2 are equal then only it will disappear

Answer 2

Answer:

when n1= n2

Explanation:

when n1 and n2 are equal, the entire system of lens and liquid behaves like a single medium as light passes through it undeviated. Hence, lens appears to be vanished