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प्रश्न
Light of different colours is deviated through different angles, by a 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 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.
संबंधित प्रश्न
In following diagram shows a thin beam of white light from a source S striking on one face of a prism.
What conclusion do you draw from the observation in part (b) above?
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(a) Complete thediagram and show how to obtain a pure spectrum.
(b) What are the conditions necessary for obtaining a pure spectrum?
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What is understood by the term dispersion of light? What is its cause?
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Draw a neat diagram to show the arrangement you would use to project a pure spectrum of white light on a screen.
The wavelengths for the light of red and blue colours are nearly 7·8 × 10-7 m and 4·8 × 10-7 m respectively.
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