Advertisements
Advertisements
प्रश्न
Explain briefly, with the help of a neat labelled diagram, how white light gets dispersed by a prism. On which surface of a prism, there is both dispersion and deviation of light, and on which surface of the prism, there is only deviation of light ?
Advertisements
उत्तर
When white light is incident on the first surface of a prism and enters in 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 prism.
On the second surface, only refraction takes place and different colours are deviated through different angles. As a result, the colours get further separated on refraction at the second surface (violet being deviated the most and red the least).
APPEARS IN
संबंधित प्रश्न
Which is refracted most by a prism : red light or violet light? Explain why?
Out of the following, the colour of light having the maximum wavelength is:
(a) violet
(b) indigo
(c) green
(d) orange
When we place a glass prism in the path of a narrow beam of white light a spectrum is obtained. What happens when a second identical prism is placed in an inverted position with respect to the first prism? Draw a labelled ray diagram to illustrate it.
Draw a labeled ray diagram to illustrate the dispersion of a narrow beam of white light when it passes through a glass prism.
A wave has wavelength 50Å of State its one use.
Draw a labelled diagram: Dispersion of light through a prism.
What do you understand by spectrum? Name the seven prominent colours in order, as obtained in the spectrum of white light.
Suggest one way, in each case, by which we can detect the presence of Infrared radiations.
Draw a neat and labelled diagram for dispersion of light.
Which one of the following is involved for the formation of rainbow in the sky?
