Question

Choose the correct answer from given options
The relationship between Brewster angle θ and speed of light v in the denser medium is

Options

• c cosθ = v

• v tanθ = c

• c = v tanθ

• v cosθ = c

Answer 1

Disclaimer: Two of the given option (b and c) are same.
Let the absolute refractive index of the given medium be μ and the speed of light in vacuum be c.

From Brewster's law:
`tan theta = mu`
The refractive index can also be written as:
`mu = c/v`

⇒ `tan theta = c/v`

⇒ `c = v tan theta`
Hence, the correct answer is option v tanθ = c.