When a light ray from a rarer medium is refracted into a denser medium, its

Question

When a light ray from a rarer medium is refracted into a denser medium, its (A) Speed increases, wavelength increases (B) Speed decreases, wavelength increases (C) Speed increases, wavelength decreases (D) Speed decreases, wavelength decreases

Tardigrade Admin · Accepted Answer

When a light ray goes from a rarer to denser medium by definition of refractive index, its speed creases.
Its frequency is found to be invarant.
So, if velocity of light in a medium is

v

:

v = f λ

[by wave theory]
or

v \propto λ

So, if

v

decreases,

λ

also decreases.

Q. When a light ray from a rarer medium is refracted into a denser medium, its

Speed increases, wavelength increases

Speed decreases, wavelength increases

Speed increases, wavelength decreases

Speed decreases, wavelength decreases

When a light ray goes from a rarer to denser medium by definition of refractive index, its speed creases. Its frequency is found to be invarant. So, if velocity of light in a medium is v : v=fλ [by wave theory] or v∝λ So, if v decreases, λ also decreases.

When a light ray goes from a rarer to denser medium by definition of refractive index, its speed creases.
Its frequency is found to be invarant.
So, if velocity of light in a medium is $v$ : $v = f λ$
[by wave theory]
or $v \propto λ$
So, if $v$ decreases, $λ$ also decreases.