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Question
Distinguish between an impure spectrum and a pure spectrum.
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Solution
A spectrum in which there is the overlapping of different colours is called an impure Spectrum. In other words, in an impure spectrum, the colours are not distinct and independent but they overlap. On the other hand, a spectrum with each colour distinct and independent is called a pure spectrum.
RELATED QUESTIONS
Study the following ray diagram:
In this diagram, the angle of incidence, the angle of emergence and the angle of deviation respectively have been represented by
(A) y, p, z
(B) x, q, z
(C) p, y, z
(D) p, z, y
While performing the experiment to trace the path of a ray of light passing through a glass prism, four students marked the incident ray and the emergent ray in their diagrams in the manner shown below. 
(A) I
(B) II
(C) III
(D) IV
Make the correct choice for each of the following:
Which one of the following Fig correctly shows the path of the ray through the glass block?
The wavelength range of white light is ______.
The phenomenon of splitting of light into its component colours is ___________ .
Which characteristic property of light is responsible for the blue colour of the sky?
Write the range of wavelength of the visible spectrum.
Suggest one way, in each case, by which we can detect the presence of Infrared radiations.
