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प्रश्न
Light of different colours is deviated through different angles by a prism. Explain the reason.
Different colours of light are deviated through different angles by a glass prism. Explain the reason.
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उत्तर
The angle of deviation produced by a prism depends on the refractive index of the material of the prism. The refractive index of the material of the prism is different for different colours of light because the speed of different colours is different inside the prism. Thus, the light of different colours is deviated through different angles by a prism.
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संबंधित प्रश्न
In following figure shows a thin beam of white light from a source S striking on one face of a prism.
Complete the diagram to show effect of prism on the beam and to show what is seen on the screen.
(i) Draw a diagram to show the splitting of white light by a prism into its constituent colour.
(ii) Draw another diagram to show how the colours of spectrum of white light can be combined
to give the effect of white light.
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?
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.
