Define the term refractive index of a medium. Can it be less than 1?

The refractive index of the second medium with respect to the first medium is defined as the ratio of the sine of the angle of incidence in the first medium to the sine of the angle of refraction in the second medium. The refractive index of a transparent medium is always greater than 1 (it cannot be less than 1) because the speed of light in any medium is always less than that in vacuum ( i.e. V < c ) and μ = 1 for air or vacuum.

What is the cause of refraction of light when it passes from one medium to another?

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State the Snell’s laws of refraction of light.

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Compare the speeds of light of wavelength 4000Å (i.e. violet light) and 8000Å (i.e. red light) in vacuum.

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How is the refractive index of a medium related to the speed of light in it and in vacuum or air?

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Physics

Define the term refractive index of a medium. Can it be less than 1?

Refraction Plane Surfaces

Related Questions

What is the cause of refraction of light when it passes from one medium to another?

State the Snell’s laws of refraction of light.

Compare the speeds of light of wavelength 4000Å (i.e. violet light) and 8000Å (i.e. red light) in vacuum.

How is the refractive index of a medium related to the speed of light in it and in vacuum or air?