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why does the sun same to rise 2 minutes before the actual sun rise and set 2 minute after the actual sunset explain with the help of labelled diagram

Posted by Shailesh Maurya 5 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 11 months ago

When the light rays passes through the atmosphere having layers of different densities and refractive indices, then atmospheric refractioon takes place. The actual sunrise takes place when the sun is above horizon. When the sun is just below the horizon, the light rays coming from it , on entring the Earth's atmosphere suffer atmospheric refraction from a rarer to denser medium . so, they bend towards the normal at each refraction. Due to continuous refraction of light rays at each layer, it follows a curved path and reaches the eye of the observer. As a result , we can see the sun 2 mins. before it rises above the horizon in the morning .

It is also due to refraction that we can still see the sun for abt 2 mins. even after the sun has set below the horizon.

As a result, the time from sunrise to sunset is increased by abt 4 mins

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Posted by Pandey Ji 6 months ago

CBSE > Class 10 > Science