The Sun is visible to us about 2 minutes before the actual sunrise and about 2 minutes after t...........

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The Sun is visible to us about 2 minutes before the actual sunrise, and about 2 minutes after the actual sunset because of

Dispersion of sunlight

Total Internal Reflection of Sunlight

Atmospheric refraction

Constructive interference of Sun light

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Explanation:

Learning: By actual sunrise, we mean the actual crossing of the horizon by the Sun. Figure below shows the actual and apparent positions of the Sun with respect to the horizon.

The time difference between actual sunset and the apparent sunset is about 2 minutes. The apparent flattening of the Sun’s disc at sunrise and sunset is also due to the same phenomenon.