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प्रश्न
What is understood by the term dispersion of light? What is its cause?
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उत्तर
The splitting of white light into its constituents colours when white light passes through a prism is called dispersion of light.
The cause of dispersion is the deviation of light of different colours through different angles, by a prism.
संबंधित प्रश्न
Which colour of white light travels fastest in glass?
In following diagram shows a thin beam of white light from a source S striking on one face of a prism.
A slit is placed in between the prism and the screen to pass only the light of green colour. What will you then observe on the screen?
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?
(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.
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?
Give a reason, why the violet colour of white light deviated most and red colour of white light deviated least.
Name the radiation of a wavelength longer than 8 × 10−7 m.
Explain, why quartz prism is required for obtaining the spectrum of ultra-violet light?
Write the approximate wavelength for red light.
