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in this nugget we will learn about prism
white light emitted by the Sun or an incandescent lamp
is a mixture of all wavelengths in the visible spectrum
its spectrum also contains radiation from the adjacent
infrared and ultraviolet regions
a well-known way of separating white light into its component wavelengths
is by means of a prism
the spectrum obtained in this way exhibits the familiar colours of the rainbow
viz. violet, blue, green
yellow, orange, and red
not all wavelengths produce the same impression of brightness
on the human eye
the highest eye sensitivity lies in the green region
at 555 Nanometre
using the electromagnetic wave theory it is possible to calculate
and predict not only the speed of light but also
aspects such as reflection, absorption,
transmission, refraction, interference
and polarization of light
however
the calculation of energy of radiation for different wavelengths
is not possible with the wave theory
for this purpose we have to apply the theory
in which light is seen as a quantum or
photon phenomenon
in the end of this nugget we conclude that prism can be used
to separate white light into a spectrum of colours
which can be identical to a rainbow thank you