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Question
Sunlight entering through a narrow aperture falls on a prism. Draw a neat labelled ray diagram to show the formation of the spectrum on a screen. Name the colour obtained nearer the base of the prism.
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Solution
The labelled ray diagram showing the formation of the spectrum of sunlight on a screen is given below. The colour obtained nearer the base of the prism is violet.
RELATED QUESTIONS
In the formation of spectrum of white light by a prism:
- which colour is deviated least?
- which colour is deviated most?
How does the speed of light determine the optical density of a medium?
How can the presence of ultraviolet radiation be detected?
Write the range of wavelength of the visible spectrum.
Match the Columns:
| Column ‘A’ | Column ‘B’ |
| The wavelength of red light | (a) 600 nm |
| (b) 700 nm | |
| (c) 500 nm |
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 ____________.
The splitting of white light into its component colours is called ____________.
dispersive power of crown glass? Given that µv = 1.5230, µr = 1.5145
Observe the given diagram and answer the questions:
- Name the process shown in the figure.
- Name the colour that deviates the most.
- Name the colour that deviates the least.
- Name any one phenomenon in nature which is based on the above process.
- Define ‘spectrum’.
