Thermal Physics> When light is refracted into a medium : (...

When light is refracted into a medium : (1) Its wavelength and frequency both increases (2) Its wavelength increases but frequency remains unchanged (3) Its wavelength decreases but frequency remains unchanged (4) Its wavelength and frequency both decrease

narayana v , 7 Years ago

Grade 12th pass

3 Answers

Saubhagyalaxmi Bhuyan

Last Activity: 7 Years ago

It's frequency remains unchanged but it's wavelength increases as velocity decreases (if in case light is moving from rarer to denser medium )

Divyanshu Dwivedi

Last Activity: 7 Years ago

It is clear that frequency of light would not change. Now depending weather light is moving from reader to sender or vice versa, wavelength would decrease in first case ,but would increase in second case.So it`s answer should be B and C.

Dev Kumar

Last Activity: 5 Years ago

The process refraction depicts the wave nature of light, which means it tells the dependency of light on velocity, wavelength, etc.,

Since,

v=fλ

⇒ v ∝ λ

⇒ if v increases then λ increases and if v decreases then λ decreases

⇒ v is independent of f

⇒ f remains unchanged in the process of refraction

⇒ Since,

v_rarer > v_denser

Therefore,

on refraction from rarer to denser medium ⇒ wavelength of light wave decreases
on refraction from denser to rarer medium ⇒ wavelength of light wave increases

in both cases frequency remains unchanged

⇒ Correct Answer is (B)&(C)