Explain briefly, with the help of a neat labelled diagram, how does white light gets dispersed by a prism. On which surface of the prism, there is both the dispersion and deviation of light?
Explain briefly, with the help of a neat labelled diagram, how does white light gets dispersed by a prism. On which surface of the prism, there is both the dispersion and deviation of light?
When white light is incident on the first surface of a prism and enters in the glass, the light of different colours due to different speeds in the 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.
On the second surface, only refraction takes place and different colours deviate 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).
Both dispersion and deviation of light take place on the first surface.
When white light is incident on the first surface of a prism and enters in the glass, the light of different colours due to different speeds in the 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.
On the second surface, only refraction takes place and different colours deviate 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).
Both dispersion and deviation of light take place on the first surface.
