Monochromatic light enters from one medium to the other. Which one of the…
2023
Monochromatic light enters from one medium to the other. Which one of the following properties does not change?
- A.
Frequency
- B.
Amplitude
- C.
Velocity
- D.
More than one of the above
- E.
None of the above
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Correct answer: A
When monochromatic light travels from one medium to another, its frequency remains constant because it is determined by the source. The velocity and wavelength change due to differences in refractive index, but frequency is invariant across media. Amplitude may decrease due to reflection or absorption, so it can change. Therefore, frequency is the only property that does not change.