Advertisements
Advertisements
प्रश्न
Explain the cause of dispersion of white light through a prism.
Advertisements
उत्तर
When white light is incident on the first surface of a prism and enters glass, light of different colours due to different speeds in glass, is refracted or deviated through different angles. Thus, the dispersion of white light into its constituent colours takes place at the first surface of the prism. Thus, the cause of dispersion is the change in the speed of light with wavelength or frequency.
APPEARS IN
संबंधित प्रश्न
A beam of white light is shone onto a glass prism. The light cannot be:
(a) deviated
(b) dispersed
(c) focused
(d) refracted
Which of the following coloured light has the least speed in glass prism?
(a) violet
(b) yellow
(c) red
(d) green
The splitting of white light into its constituent colours is called .............
Which is optically denser: water or air? Give reason
If a monochromatic beam of light undergoes minimum deviation through an equiangular prism, how does the beam pass through the prism, with respect to its base?
State two uses of ultraviolet radiation.
Write the range of wavelength of the ultraviolet spectrum.
What is Newton’s disc?
What is a rainbow?
When sunlight passes through water droplets in the atmosphere it gets dispersed into its constituent colours forming a rainbow. A similar phenomenon is observed when white light passes through a prism.
Instead of sunlight, a green-coloured ray is passed through a glass prism. What will be the colour of the emergent ray?
