GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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lightning discharge in atmosphere
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action of ultraviolet light from the sun on atmospheric oxygen
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collision between fast neutrons and nitrogen nuclei present in the atmosphere
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action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere
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Detailed explanation-1: -The high energy cosmic rays from the sun constantly bombard with the upper atmosphere. These high energy particles undergo a whole cascade of nuclear reactions resulting in slow-moving neutrons. These neutrons react with nitrogen atoms in the atmosphere and result in the formation of radiocarbon.
Detailed explanation-2: -Option A Solution: Radiocarbon is produced in the atmosphere as a result of collision between fast neutrons and nitrogen nuclei present in the atmosphere.
Detailed explanation-3: -Carbon-14 is produced in the stratosphere by nuclear reactions of atmospheric nitrogen with thermal neutrons produced naturally by cosmic rays (with the highest production rate 10 to 13 miles above Earth’s poles), as well as by atmospheric nuclear weapons testing in the 1950s and ‘60s.
Detailed explanation-4: -Carbon-14 is produced in the atmosphere by a low-energy cosmic-ray neutron reaction with nitrogen.
Detailed explanation-5: -Carbon-14 is continuously generated in the atmosphere by cosmic radiation. Neutrons are ejected from nuclei of the upper atmosphere in collisions with cosmic rays (A). Captured by nitrogen nuclei (N-14), neutrons transform these nuclei into carbon-14 (B).