Advertisements
Advertisements
प्रश्न
Give a reason, why the violet colour of white light deviated most and red colour of white light deviated least.
Advertisements
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
Name three factors on which the deviation produced by a prism depends and state how does it depend on the factors stated by you.
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.
Write the approximate wavelengths for blue.
Draw another diagram to show how the colours of spectrum of white light can be combined to give the effect of white light.
What is understood by the term dispersion of light? What is its cause?
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?
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.
Write the approximate wavelength for red light.
