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Which of the following statements regarding the penetrating power of radioactive decays? α-rays have low penetrating power than γ-rays Beta rays can penetrate a 5 mm aluminum sheet. Gama has the highest penetrating power.

Which of the following statements regarding the penetrating power of radioactive decays? α-rays have low penetrating power than γ-rays Beta rays can penetrate a 5 mm aluminum sheet. Gama has the highest penetrating power. Correct Answer Statement (i) and (iii) are true.

The correct answer is Statement (i) and (iii) are true.

  • Fig. showing penetrating power of alpha, beta, and gamma.
  • Gamma has the highest penetrating power.
  • Beta rays can only penetrate paper but not a 5mm aluminum sheet.

[ alt="20141110-101236607-7535-absorb rad" decay study material for iit jee askiitians src="https://files.askiitians.com/cdn1/images/20141110-101236607-7535-absorb_rad.gif" style="height: 214px; width: 300px; border-width: 1px; border-style: solid;">

  • Hence Statement (i) and (iii) are true.

Notes:

Radiation Ionizing power Can pass through 5mm aluminum Electric field deflection
Alpha High No Towards negative plate
Beta Less than alpha No Towards positive plate
Gamma Weak  Yes No deflection

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