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A beam of monochromatic light is refracted from vacuum into a medium of refractive index 1.5, the wavelength of refracted light will be
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- dependent on intensity of refracted light
- same
- smaller
- larger
Correct Option: C
| From μ = | = | , λm = | |||
| v | n λm | μ |
Here, c = velocity of light in medium and v = velocity of light in vacuum;
µ = refractive index of the medium.
Hence, wavelength in medium (λm) < λa
(∵ µ > 1, given)
So, the required wavelength decreases.
ALTERNATIVELY,
c = vλ . On refraction, the frequency, do not change. When light is refracted from vacuum to a medium, the velocity, c decreases. Therefore , λ also decreases.
