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प्रश्न
Give a reason, why the violet colour of white light deviated most and red colour of white light deviated least.
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उत्तर
The reason is that the speed of violet light in glass is least while that of red light is most. Since. Refractive index of glass = speed of light in air/speed of light in the glass, so the refractive index of glass (the material of prism) is most for violet light and least for the red light. Hence, the violet light has deviated most and red light is deviated least.
संबंधित प्रश्न
How does the deviation produced by a triangular prism depend on the colours (or wavelengths) of light incident on it?
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.
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?
Explain, why quartz prism is required for obtaining the spectrum of ultra-violet light?
Which colour of white light travels slowest, in glass?
Write the approximate wavelength for red light.
