Question

JEE mains Previous year question
chapter :- Geometrical Optics​​

Answer 1

Answer:

which class

Explanation: in which class do you read

Answer 2

Answer:

For critical angle (θ) we know,

$\sin θ = \frac{1}{μ}$

The refractive index (μ) of the medium is inversely proportional to the wavelength of the light and directly proportional to the frequency.

as we know the frequency decreases,,

i.e, for lesser frequency of light μ will also be lesser and θ will be more.

Hence, the spectrum of visible light whose frequency is less than that of green light with come out to air medium.