What are the frequency and wavelength ranges of visible light

The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye. Electromagnetic radiation in this range of wavelengths is called visible light or simply light. A typical human eye will respond to wavelengths from about 390 to 700 nanometers.[1] In terms of frequency, this corresponds to a band in the vicinity of 430–770 THz.

Answer(2) electrons;

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