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CBSE 12-science - Physics
sole
Asked by hanskaraja | 05 Aug, 2022, 11:20: PM
CBSE 12-science - Physics
please help
Asked by arpitarout132 | 29 Apr, 2022, 01:12: AM
ANSWERED BY EXPERT
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- Frequency increases speed decreases
- frequency is same but wavelength is smaller in denser medium then in rarer
- frequency is same but wavelength is greater in denser medium then in rarer
- frequency decrease and wavelength same
Option 2 : frequency is same but wavelength is smaller in denser medium then in rarer
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CONCEPT:
- When light is passed from a rarer medium to a denser medium the frequency of light remains the same but the speed of light decreases.
EXPLANATION:
We know the relation between frequency (f) wavelength (λ) and speed (v):
v = f λ
When light passes from rarer medium to denser medium frequency remain the same but speed decrease
ν = constant
λ decreases
- Option 1 is incorrect because frequency doesn't change in refraction
- Option 2 is correct because in refraction frequency is the same and the wavelength decreases as light travel from rarer to denser.
- Option 3 is incorrect because wavelength decreases as light travel from rarer to denser.
- Option 4 is incorrect because frequency doesn't change in refraction.
So, option 2 is the correct choice.
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