Question

When a ray of light enters a glass slab its wavelength

Answer 1

Answer:

The velocity and wavelength changes but the frequency remains the same.

Answer 2

When a ray of light enters a glass slab its wavelength changes

Explanation:

• Whenever ray of light enters into different medium then its wavelength changes
• According to molecular theory light going from rarer medium and enters into denser medium experience more molecules which provides more resistance to the movement of molecules hence speed reduces also the wavelength changes or reduces
• When ray of light moves from denser to rarer medium experience reduction in molecules hence can move freely so the speed and wavelength increases

                                                   $n =\frac{c}{v} =\frac{x_{0} }{x_{n} }$

where, n= refractive index of given medium

c = speed of light in vacuum

v = speed of light in medium

x₀ = wavelength of light in vacuum

x ₙ = wavelength of light in medium

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