InterviewSolution
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InterviewSolution
| 1. |
What is advance sunrise and delayed sunset? |
| Answer» Due to refraction:The light rays through vacuum and then through the atmosphere of the earth and then it is finally seen by us. Vacuum will be a rare medium and the earth’s atmosphere with all its temperature changes, winds, different gases, will be a denser medium in comparison. Bending of light occurs.During sunrise, when the sun is just below the horizon, our atmosphere causes the light rays to bend and we see the sun early. Similarly, at sunset, the apparent position of the sun is visible to us and not the actual position due to the same bending of light rays effect. Due to refraction we see the sun rise about two minutes before it’s actually there and during sunset we see it for around two minutes more, even though it has already moved from that position. | |