Background radiation are

Radiations which originate from a radioactive compound in the earth’s crust

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Radiations which originate particles and rays entering the earth’s atmosphere are known as background radiations

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Neither (a) nor (b) are correct

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Both (a) and (b) are correct

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Solution

The correct option is D
Both (a) and (b) are correct

Radiations which originate from a radioactive compound in the earth’s crust and from particles and rays entering the earth’s atmosphere are known as background radiations.

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Background radiation are

Question 1
The atmosphere of the earth is heated by radiations which are mainly:

(a) radiated by the sun
(b) re-radiated by land
(c) re-radiated by water
(d) re-radiated by land and water

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Reason [R]: Nuclear explosion results in the release of radionuclides which are long lived and remain suspended in the atmosphere.

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Background radiation are

The correct option is D Both (a) and (b) are correctRadiations which originate from a radioactive compound in the earth’s crust and from particles and rays entering the earth’s atmosphere are known as background radiations.

The correct option is D
Both (a) and (b) are correct

Radiations which originate from a radioactive compound in the earth’s crust and from particles and rays entering the earth’s atmosphere are known as background radiations.