how is spectrum formed
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A prism used commonly in the lab is a traingular prism. This is an optical element that has flat, polished and shining surfaces which can refract light. If you project the light that passes through the prism on a white screen, you will see a sequence of seven colors in the following order : Violet, Indigo, Blue, Green, Yellow, Orange and Red.
The range of colors obtained is called the spectrum.
An emission spectrum is the line pattern formed when an element is excited and gives off energy. An absorption spectrum is formed when white light passes through a cool gas. The gas absorbs certain wavelengths of energy and allows others to pass through.
The range of colors obtained is called the spectrum.
An emission spectrum is the line pattern formed when an element is excited and gives off energy. An absorption spectrum is formed when white light passes through a cool gas. The gas absorbs certain wavelengths of energy and allows others to pass through.
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