Question

when lights ray passes from air to glass slab then it _______
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Answer 1

Answer:

When a ray of light enters a glass slab from air then its speed decreases as it encounters a dense medium. Since to conserve energy (which is dependent solely on frequency), the frequency must remain constant, the wavelength of light changes. Wavelength is decreased by a factor called refractive index of the medium.

Answer 2

Answer:

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