Question

what is meant by advanced sunrise and delayed sunset?​

Answer 1

Explanation:

Advanced sunrise and delayed sunset are phenomena caused due to atmospheric refraction. In this the Sun appears to rise early by 2 minutes and set late by 2 minutes. The diagram below shows this phenomenon. When the rays from the Sun hit the atmosphere they get refracted.

Answer 2

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The sun appears about 2 minutes before the actual sunrise which is called advanced sunrise and sets 2 minutes after the sunset, which is called delyaed sunset. These phenomenas occur due to refraction of light.