A ray of light travelling in a medium of...

A ray of light travelling in a medium of refractive index `mu_1` is incident obliquely at the boundary of a medium of refractive index `mu_2`. The ray may reflect back totally only when `u_1` is _____ `mu_2`.

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To solve the question, we need to understand the concept of total internal reflection (TIR) and the conditions under which it occurs. ### Step-by-Step Solution: 1. **Understanding Refractive Index**: - The refractive index (denoted as `mu`) is a measure of how much light slows down in a medium compared to its speed in a vacuum. - A medium with a higher refractive index is considered denser than a medium with a lower refractive index. ...

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An e.m. wave is travelling through a medium of refractive index mu_1 , and is incident on the boundary of a medium of refractive index mu_2 . IF the wave reflects at the boundary

The wave undergoes a phase change of `180^@` if `mu_1 lt mu_2`

The wave undergoes a phase change of `180^@` if `mu_1 gt mu_2`

The wave undergoes a phase change if `mu_1 lt mu_2`

The wave undergoes a phase change if `mu_1 gt mu_2`

Velocity (v) of light in a medium (refractive index mu ) vary as

`mupropv^(2)`

`muprop1/v^(2)`

`mupropv`

`muprop1/v`

A ray of light travelling in air is incident at 45^(@) on a medium of refractive index sqrt(2) . The angle of refractive in the medium is

A. ` 45^(@)`

B.`60^(@)`

C.`30^(@)`

D.`70^(@)`