Question

Name the following:
jal A lens which is diverging in nature
b) A lens which is converging in natu
(c) A lens which shows burning actio
d) A lens which always forms erect
el The splitting of white light into it​

Answer 1

Answer:

<1.33

The nature of the lens will change only if its taken from air in a medium with refractive index greater than the material of the lens.

This can be deduced from the formula given in the concept.

( For a converging lens, if (

μ

l

μ

g

−1) becomes negative i.e. μ

g

<μ

l

, it becomes divergent.)

So, the refractive index of lens is less than that of water.

So, μ<1.33 (but greater than one otherwise it wont be convergent in first place)