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प्रश्न
State the cause of dispersion of white light
उत्तर
When a beam of white light enters a prism, it gets refracted at the point and splits into its seven constituent colors, viz. violet, indigo, blue, green, yellow, orange, and red. The acronym for the seven constituent colors of white light is VIBGYOR. This splitting of the light rays occurs because of the different angles of bending for each color and this different angles of bending occur because the different component of light faces different refractive indices when passing through the glass prism.
When a narrow beam of sunlight is allowed to fall on one of the rectangular surfaces of the glass prism, we obtain a colored spectrum with red and violet color at its extreme.
APPEARS IN
संबंधित प्रश्न
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.
After tracing the path of a ray of light through a glass prism a student marked the angle of incidence (∠i), angle of refraction (∠r) angle of emergence (∠e) and the angle of deviation (∠D) as shown in the diagram. The correctly marked angles are :
(A) ∠i and ∠r
(B) ∠i and ∠e
(C) ∠i, ∠e and ∠D
(D) ∠i, ∠r and ∠e
What will happen if another similar glass prism is placed upside down behind the first prism?
Make two diagrams to explain refraction and dispersion.
Explain the cause of dispersion of white light through a prism.
A wave has wavelength 50Å of name the wave.
Answer the following:
What do you mean by dispersion? Name the different colours of light in the proper sequence in the spectrum of light.
The sunlight can be split into its constituent colors using ______.
Say TRUE or FALSE
After passing through a prism, white light splits into a band of seven colours
In the following diagram showing dispersion of white light by a glass prism, the colours 'P' and 'Q’ respectively are:
