Question

how do the ionizing power and penetrating power of positrons compare to other types of radiation?

• positrons have low ionizing power and low penetrating power
• positrons have high ionizing power and very low penetrating power
• positrons have high ionizing power and high penetrating power
• positrons have low ionizing power and high penetrating power
• positrons have intermediate ionizing power and penetrating power

Explanation:

To determine the correct answer, we recall the properties of positrons (a type of radiation). Positrons, like alpha particles, have relatively large mass and charge, leading to high ionizing power (they interact strongly with matter, ionizing many atoms). However, their large mass and charge also mean they interact quickly with matter, resulting in very low penetrating power (they can't travel far through materials). Among the options, the one stating "Positrons have high ionizing power and very low penetrating power" matches this.

Answer:

B. Positrons have high ionizing power and very low penetrating power (assuming the second option is labeled B; adjust label based on actual option numbering, but the text of the correct option is as stated)