GK
THE UNIVERSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The light we see from objects in the sky are from the past
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True
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False
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -Because stars are so far away, it takes years for their light to reach us. Therefore, when you look at a star, you are actually seeing what it looked like years ago.
Detailed explanation-2: -We are seeing into the past too. While sound travels about a kilometre every three seconds, light travels 300, 000 kilometres every second. When we see a flash of lighting three kilometres away, we are seeing something that happened a hundredth of a millisecond ago.
Detailed explanation-3: -1) We have no way of catching up to light from the past. It travels faster than we can ever hope to, so we would never be able to set up a mirror in a place that would reflect light from before when we left earth to set up the mirror.
There is 1 question to complete.