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प्रश्न
What is meant by dispersion of white light? Describe the formation of rainbow in the sky with the help of a diagram.
उत्तर
A rainbow is formed in the sky because of the dispersion of sunlight by millions of water droplets in the atmosphere. Every single water droplet behaves like a tiny glass prism that splits the white light into different colours. Different colours bend at different angles on passing through the water droplets, thus separating the white light into a natural spectrum of seven colours, namely, violet, indigo, blue, green, yellow, orange and red. The diagram presented supports the above explanation and gives a clear picture about the formation of a rainbow.
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संबंधित प्रश्न
What is a rainbow? Draw a labelled diagram to show the formation of a rainbow.
Which colour of the spectrum has
longest wavelength,
Which colour of light has the shorter wavelength − red or violet?
Which phenomenon makes us see the sun:
a few minutes before actual sunrise?
Which phenomenon makes us see the sun:
a few minutes after actual sunset?
What is meant by advance sunrise and delayed sunset? Draw a labelled diagram to explain these phenomena.
To an astronaut in a space-ship, the earth appears ______.
Blue litmus is added to two test tubes A and B containing dilute HCl and NaOH. Answer respectively. In which test tube a colour change will be observed? State the colour change and give its reason.
The clear sky appears blue because:
The colour of clear sky from the earth appears blue but from the space it appears black. Why?
