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Explain the different cases of refraction …

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Explain the different cases of refraction with the help of suitable diagram

Posted by Pradeep Gupta 5 years, 4 months ago

CBSE > Class 10 > Science

1 answers

Meghna Thapar 5 years, 4 months ago

Atmospheric refraction is the phenomenon of bending of light on passing through the Earth’s atmosphere. The reason for this occurrence is that the upper layers of the Earth’s atmosphere are rarer compared to the lower layers.

On account of atmospheric refraction of light,

The stars seem higher than they actually are.
The Sun appears to rise 2 minutes before and set 2 minutes later, increasing the apparent length of the day by 4 minutes.
The Sun appears oval at sunrise and sunset, but appears circular at noon.
The stars twinkle and planets do not.

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CBSE > Class 10 > Science