Hello! I've been quite puzzled by this question and its solution.(adsbygoogle = window.adsbygoogle || []).push({});

Explain why beta-particles penetrate through matter more easily compared with alpha-particles having the same KE?

The answer given goes: The mass of beta-particles are much smaller than those of alpha-particles, hence the fractional loss of kinetic energy per collision for beta-particles are smaller and therefore beta-particles are more penetrating.

Why is the fractional loss of KE per collision positively dependent on the masses? Is there a mathematical way to reason this out?

Thanks :)

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# Homework Help: Penetrating power of a beta particle

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