Advertisements
Advertisements
प्रश्न
State two properties of ultra-violet radiations which differ from visible light.
Advertisements
उत्तर
(i) Ultra-violet radiations are of wavelength shorter than that of visible light.
(ii) Ultra-violet radiations are more chemically active than the visible light.
संबंधित प्रश्न
In the formation of spectrum of white light by a prism:
which colour is deviated most?
What happens when a ray of ordinary light is passed through a triangular glass prism?
Describe how you could demonstrate that white light is composed of a number of colours.
A beam of white light is shone onto a glass prism. The light cannot be:
(a) deviated
(b) dispersed
(c) focused
(d) refracted
An object AB is placed in front of a convex lens as shown in fig. 4. Complete the ray diagram and obtain the image formed and state the nature of the image.
The phenomenon of splitting of light into its component colours is ___________ .
Distinguish between an impure spectrum and a pure spectrum.
In the following diagram showing dispersion of white light by a glass prism, the colours 'P' and 'Q’ respectively are:
A ray of light is incident at 45° on an equilateral prism in the diagram below.
- Name the phenomenon exhibited by the ray of light when it enters and emerges out of the prism.
- State the cause of the above phenomenon mentioned by you.
