Question

please answer me this question given in the attachment please ​

Answer 1

The speed of light with critical angle 45° is "2.12×10⁸m/s"

The colour of light with the maximum critical angle is "Red"

The colour of light with the minimum critical angle is "Violet"

Explanation:

Since:-

C=45°

μ=1/sin C

=1/sin45°

=root2

We know that:-

v=c/μ

=(3×10⁸m/s)/root2

By calculating we get:

2.12×10⁸m/s