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Question
Define the term dispersion of light.
Solution
The phenomenon of the splitting of white light by a prism into its constituent colours is known as dispersion of light.
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RELATED QUESTIONS
A narrow beam PQ of white light is passing through a glass prism ABC as shown in the diagram.
Trace it on your answer sheet and show the path of the emergent beam as observed on the screen DE.
(i) Write the name and cause of the phenomenon observed.
(ii) Where else in nature is this phenomenon observed?
(iii) Based on this observation, state the conclusion which can be drawn about the constituents of white light.
State the cause of dispersion of white light
The speed of light in air or vacuum is
A ray of light moving from an optically rarer to a denser medium
In the following diagram, the correctly marked angles are
(A) All
(B) Only ∠i and ∠A
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(D) ∠i, ∠A and ∠D
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(i) a monochromatic light, and
(ii) white light passes through
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Say TRUE or FALSE
Rainbow is formed by dispersion of which light by water drops
The dispersive powers of flint glass and crown glass are 0.053 and 0.034, respectively and their mean refractive indices are 1.68 and 1.53 for white light. Calculate the angle of the flint glass prism required to form an achromatic combination with a crown glass prism of refracting angle 4°:
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