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Question

The three types of radioactivity in increasing order of penetrating power are?


A

beta, alpha, gamma

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B

gamma, beta, alpha

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C

alpha, beta, gamma

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D

alpha, gamma, beta

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Solution

The correct option is C

alpha, beta, gamma


α-rays have the least penetrating power, they can penetrate a 0.01 mm thick Al foil.

β-rays have more penetrating power than alpha-rays, they can penetrate a 0.2 mm Al foil.

γ-rays have the highest penetrating power, they can penetrate a 1000 mm thick Al sheet.


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