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प्रश्न
Name three factors on which the deviation produced by a prism depends and state how does it depend on the factors stated by you.
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उत्तर
The following four factors affect the deviation the prism produces:
- The angle of incidence: As the angle of incidence increases, first the angle of deviation decreases and reaches a minimum value for a certain angle of incidence. By further increasing the angle of incidence, the angle of deviation is found to increase.
- The material of the prism (i.e., refractive index): for a given angle of incidence, the prism with a higher refractive index produces a greater deviation than the prism with a lower refractive index.
- Angle of prism: The angle of deviation increases with the increase in the angle of the prism.
- The colour or wavelength of light used increases the angle of deviation with a decrease in the wavelength of light.
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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.
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?
Explain, why quartz prism is required for obtaining the spectrum of ultra-violet light?
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.
Which colour of white light travels slowest, in glass?
