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प्रश्न
A beam of white light is shone onto a glass prism. The light cannot be:
(a) deviated
(b) dispersed
(c) focused
(d) refracted
उत्तर
focussed
A beam of white light when shone on to a glass prism can be deviated, dispersed or refracted, but it cannot be focussed.
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संबंधित प्रश्न
As light rays pass from air into a glass prism, are they refracted towards or away from the normal?
In the formation of spectrum of white light by a prism:
which colour is deviated least?
What are the seven colours seen in a rainbow?
What conclusion do you draw about the nature of white light in part (b)?
The frequency range of visible light is from 3.75 × 1014 Hz to 7.5 × 1014 Hz. Calculate its wavelength range. Take speed of light = 3 × 108 m/s.
Answer the following:
What do you mean by dispersion? Name the different colours of light in the proper sequence in the spectrum of light.
State two properties of ultra-violet radiations which differ from visible light.
Write the range of wavelength of the infrared spectrum.
During dispersion of white light by prism placed in air, for a particular value of angle of prism,
______ colour is deviated the least in the spectrum of white light obtained with a glass prism.
