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Q.

Is it true that the rainbow in the sky appears only after rainfall because water droplets behave like a prism and disperse sunlight? 


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is true.
Raindrops are suspended in the air after a rain shower, and when a ray of light enters the drop, it acts as a prism, splitting into its component colours as dispersion occurs. As a result, different coloured lights emerge from the raindrops, such as red at the top and violet at the bottom. Due to this, a rainbow forms.
 
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Is it true that the rainbow in the sky appears only after rainfall because water droplets behave like a prism and disperse sunlight?