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प्रश्न
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.
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उत्तर
- When light enters the prism and experiences refraction upon exiting, it is said to have undergone dispersion.
- It disperses because the incident light is a polychromatic ray made up of different light wave lengths. As light travels from a denser medium to a rarer medium, refraction takes place.
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संबंधित प्रश्न
Study the following ray diagram:
In this diagram, the angle of incidence, the angle of emergence and the angle of deviation respectively have been represented by
(A) y, p, z
(B) x, q, z
(C) p, y, z
(D) p, z, y
The coloured light having the maximum speed in glass prism is:
(a) blue
(b) green
(c) violet
(d) yellow
Which of the following colour of white light has the least wavelength?
(a) red
(b) orange
(c) violet
(d) blue
The seven colours in the spectrum of sunlight in order, are represented as :
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 ?
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.
Write three conditions necessary to obtain a pure spectrum on a screen. Name the instrument in which the conditions stated by you are fulfilled.
The process of separation of light into its component colours while passing through a medium is called _______.
When white light enters a glass prism from the air, the angle of deviation is least for ____________.
