GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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instantaneously
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8 minutes
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3 ly
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None of the above
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Detailed explanation-1: -If the Sun suddenly disappeared, it would take about eight minutes for Earth to become dark (due to the speed of light).
Detailed explanation-2: -At least around 8 minutes! Sun is roughly 8 light minutes away from Earth, so anything that happens there will affect us 8 minutes after.
Detailed explanation-3: -If the Sun miraculously disappeared, the Earth (and all the other objects in the Solar System) would continue their forward motion in a straight line off into space, instead of following their almost-circular orbits. For the Earth this means it would head off towards the stars at about 30km/s (67, 000mph).
Detailed explanation-4: -Light takes roughly eight minutes to reach Earth from the sun. For that reason, if the sun disappeared, we’d still see it in the sky for another eight minutes.
Detailed explanation-5: -Eternal night would fall over the planet and Earth will start traveling into interstellar space at 18 miles per second. Within 2 seconds, the full moon reflecting the sun’s rays on the dark side of the planet would also go dark.