Which of the following does not change when light travels from one medium to another?a)Velocityb)Wavelengthc)Frequencyd)Refractive indexe)None of the above / More than one of the aboveCorrect answer is option 'C'. Can you explain this answer?

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Which of the following does not change when light travels from one medium to another?

a)
Velocity
b)
Wavelength
c)
Frequency
d)
Refractive index
e)
None of the above / More than one of the above

Correct answer is option 'C'. Can you explain this answer?

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Which of the following does not change when light travels from one med...

Refraction of Light:

It is the phenomenon of deviation of light rays from its path when it travels from one transparent medium to another transparent medium.
The cause of refraction is the speed of light which is different in a different mediums.
In refraction, the speed of light & its wavelength change but its frequency remains unchanged.
- Here, the refractive index is also equal to the velocity of light c of a given wavelength in empty space divided by its velocity v in a substance.
- Thus, Velocity, Wavelength & Refractive index changes when light travels from one medium to another but Frequency remains unchanged.
When a light ray travels from a denser medium to a rarer medium, it deviates away from the normal.
When a light ray travels from a rarer medium to a denser medium, it deviates from the normal.

Laws of refraction:

The incident ray, the refracted ray & the normal at the point of incidence all three lie in the same plane.
The ratio of the sine of the angle of incidence to the sine of the angle of refraction remains constant for a pair of the medium.
- sin i / sin r = constant (¹u₂).
  - This is also called Snell's law.

Refractive index:

The ratio of the speed of light in vacuum (c) to the speed of light in any medium (v), is called the refractive index.
It is given by: u = c / v.

Relative refractive index:

The refractive index of the second medium with respect to the first medium is given by u = v₁ / v₂.
- where v₁ = Speed of light in the first medium.
  - v₂ = speed of light in the second medium

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Which of the following does not change when light travels from one medium to another?a)Velocityb)Wavelengthc)Frequencyd)Refractive indexe)None of the above / More than one of the aboveCorrect answer is option 'C'. Can you explain this answer?

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