Advertisements
Advertisements
Question
Explain, why quartz prism is required for obtaining the spectrum of ultra-violet light?
Advertisements
Solution
The reason is that glass absorbs ultra-violet radiation while the quartz does not absorb them.
RELATED QUESTIONS
Why is the colour red used as a sign of danger?
Write the approximate wavelengths for blue.
Draw another diagram to show how the colours of spectrum of white light can be combined to give the effect of white light.
Fig shows part of the arrangement for obtaining pure spectrum.
(a) Complete thediagram and show how to obtain a pure spectrum.
(b) What are the conditions necessary for obtaining a pure spectrum?

Light of different colours is deviated through different angles, by a prism. Explain the reason.
What is understood by the term dispersion of light? What is its cause?
Name the radiation of a wavelength longer than 8 × 10−7 m.
Draw a neat diagram to show the arrangement you would use to project a pure spectrum of white light on a screen.
Comment on the statement: ‘When any ray of white light is incident on a glass prism, it simply disperses it into its seven constituent colours.
Which colour of white light travels slowest, in glass?
