GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which one is the closest approximate of the speed of gamma ray in air?
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300 000 000 m/s
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300 m/s
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300 000 m/s
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3 000 000 m/s
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Explanation:
Detailed explanation-1: -Therefore the speed of gamma radiation in air or vacuum is equal to the 3 × 10 8 m / s .
Detailed explanation-2: -The speed of light in vacuum, commonly denoted c, is a universal physical constant that is exactly equal to 299, 792, 458 metres per second (approximately 300, 000 kilometres per second; 186, 000 miles per second; 671 million miles per hour).
Detailed explanation-3: -Gamma rays can be emitted from the nucleus of an atom during radioactive decay. They are able to travel tens of yards or more in air and can easily penetrate the human body.
Detailed explanation-4: -Gamma radiation has effectively an infinite range in air.
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