Why rainbow are always in semicircle

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Why rainbow are always in semicircle

Posted by Prachi Sah 5 years, 11 months ago

CBSE > Class 10 > Science

2 answers

Yogita Ingle 5 years, 11 months ago

- A rainbow is an arch of seven colours and is produced by the dispersion of the Sun’s light by tiny raindrops present in the atmosphere.

- The observer receives only one colour from the raindrop at a time.

- The red rays from the drops make a certain angle with the eye line joining the Sun and the observer.
- So, all water drops which appear red will make the same angle with the line of vision.

- Hence, they will appear in the form of an arc of a circle with its centre on the eye line.

- The other colours also appear in a similar manner.

- Red rays make an angle of 42.8° with the line of vision and is seen on the outer edge of the rainbow.

- Violet rays make an angle of 40.8° with the line of vision and is seen on the inner edge of the rainbow.

- Thus, the rainbow appears in the form of a bow or a semi circle

0Thank You

Shreya ?? 5 years, 11 months ago

Because of heavy pots of gold at each end..

0Thank You

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CBSE > Class 10 > Science