GK
SOLAR SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What’s the speed of light?
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300 000 km per second
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300 000 metres per second
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3000 km per second
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300 000 km per hour
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Explanation:
Detailed explanation-1: -Light from a stationary source travels at 300, 000 km/sec (186, 000 miles/sec).
Detailed explanation-2: -Light moves the fastest in vacuum (About 300, 000 kilometers per second). The greater the density of a medium, the slower the speed becomes.
Detailed explanation-3: -Nothing can travel faster than 300, 000 kilometers per second (186, 000 miles per second). Only massless particles, including photons, which make up light, can travel at that speed. It’s impossible to accelerate any material object up to the speed of light because it would take an infinite amount of energy to do so.
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