Question

How do you obtain a spectrum nbr of light

Answer 1

The wavelength of visible light ranges from 390 to 700 nm. The absorption spectrum of a chemical element or chemical compound is the spectrum of frequencies or wavelengths of incident radiation that are absorbed by the compound due to electron transitions from a lower to a higher energy state.

Answer 2

Here is your answer-

Spectrum is a group of colours. This colours are violet ,Indigo ,blue ,green ,yellow, orange, and red. Sir Isaac Newton was a first person to use glass prism for obtaining Sun's spectrum.
When light get enter in prism it get dispersed and refracted then there is a internal reflection and 7 colours form.

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