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Are there any materials that change the electromagnetic wavelength of visible light?

Are there any materials that change the electromagnetic wavelength of visible light?

Grade:9

2 Answers

Saurabh Koranglekar
askIITians Faculty 10341 Points
one year ago
Dear student

The answer is Yes

Regards
Vikas TU
14149 Points
one year ago
Yes there are. Precious stones normally do that. The incident visible light has not enough energy to excite electrons from the valence band (dark band) to the conduction band (empty withe band) since the most energetic wavelength (violet) is only around 3.1eV.

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