The Refraction of White Light to Produce Colours.
What is a Spectrum?
The dispersing of light
or other electromagnetic radiation
into its component parts produces a spectrum.
A glass prism of angle 60 degrees can disperse
white light into its different colours. See the picture below.
What are the Colours of the Spectrum of White Light?
colours of light are
Red, Orange, Yellow, Green, Blue, Indigo and violet.
You can remember the colours and order by remembering
Richard of York gave battle in vain.
The different colours of
light have each
a different frequency and wavelength.
The different colours are refracted by different amounts.
light has the longest
wavelength and is refracted least.
Violet light has the shortest wavelength and is refracted most.
The source of light may also emit infra-red and ultraviolet light.
is heat radiation with a
longer wavelength than red light.
A thermometer placed at IR will show a rise in temperature.
light has a shorter wavelength
than violet light.
A fluorescent material will glow when placed at UV.
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