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प्रश्न
In the following diagram showing dispersion of white light by a glass prism, the colours 'P' and 'Q’ respectively are:
विकल्प
Red and Violet
Violet and Red
Red and Blue
Orange and Green
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उत्तर
Violet and Red
Explanation:
The splitting of white light into its constituent colours is known as light dispersion. The spectrum is the band of seven colours produced by splitting white light. All of the constituent colours of white light have the same velocity in vacuum, but their velocity changes when they pass through a transparent 'medium' like a glass prism. Different colours are diverted by different angles on the prism's initial face. Violet's minimum speed is deviated by the maximum angle, whereas red's maximum speed is distorted by the minimum angle. As a result, the letters 'P' and 'Q' are violet and crimson, respectively.
संबंधित प्रश्न
(i) A ray of white light breaks up into its components while passing through a glass prism. Draw a ray diagram to show the path of rays.
(ii) Mark the least deviated colour in your diagram
(iii) Why do different coloured rays deviate differently in a prism?
Fill in the blank with suitable word:
When a ray of light enters a prism, it bends ................ the normal ; as it leaves the prism, it bends ................. the normal.
How could you show that the colours of the spectrum combine to give white light?
What is a rainbow? What are the two conditions necessary for the formation of a rainbow in the sky?
When we place a glass prism in the path of a narrow beam of white light a spectrum is obtained. What happens when a second identical prism is placed in an inverted position with respect to the first prism? Draw a labelled ray diagram to illustrate it.
A student has to trace the path of a ray of light through a glass prism. List four precautions he should observe for better results.
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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.
Say TRUE or FALSE
After passing through a prism, white light splits into a band of seven colours
The phenomena of light involved in the formation of rainbow are ______.
