Question
We can see the sun even when it is little below the horizon.
✓
Answer
(i) By sunrise we mean the appearance of the sun above the horizon.
(ii) When the Sun is some what below the horizon, its light rays are able to reach us along a curved path due to their refraction through Earths atmosphere.
(iii) Thus we see the Sun even before it emerges above the horizon.
(iv) Same thing happens at the time of sunset, we keep seeing the Sun for a short while even after it goes below horizon.
(ii) When the Sun is some what below the horizon, its light rays are able to reach us along a curved path due to their refraction through Earths atmosphere.
(iii) Thus we see the Sun even before it emerges above the horizon.
(iv) Same thing happens at the time of sunset, we keep seeing the Sun for a short while even after it goes below horizon.
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