A beam of monochromatic light enters in air from the glass medium. Which of following properties will change?

Frequency and wavelength

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Frequency and speed

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Speed and wavelength

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Speed only

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Wavelength only

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Solution

The correct option is C Speed and wavelength
The frequency of a light ray remains the same on changing of medium.
The speed of the wave would increase and become,
$v_{a i r} = v_{g l a s s} \times μ_{g}$
From the relation $v = λ ν$
the wavelength of the light in air would become,
$λ_{a i r} = λ_{g l a s s} \times μ_{g}$

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A beam of monochromatic light enters in air from the glass medium. Which of following properties will change?

The correct option is C Speed and wavelengthThe frequency of a light ray remains the same on changing of medium.The speed of the wave would increase and become,vair=vglass×μgFrom the relation v=λνthe wavelength of the light in air would become, λair=λglass×μg