Physics
Which one of the following processes is responsible for the glittering of air bubble rising through water?

Scattering of light
Reflection of light
Refraction of light
Total internal reflection of light

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Physics
Radiocarbon is produced in the atmosphere as a result of

Lightning discharge in atmosphere.
Action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere.
Collision between fast neutrons and nitrogen nuclei present in the atmosphere.
Action of ultraviolet light from the sun on atmospheric oxygen.

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