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Name: Gayle
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If gamma rays can penetrate everything, then how can the atmosphere stop gamma and x-rays?

You have started with a false assumption that "gamma rays can penetrate everything". That is not the case. True, they are very penetrating, but they do interact with matter, and their "tracks" can be observed.

Vince Calder

Gamma rays don't penetrate materials infinitely, they just penetrate a lot more deeply into materials (than, for example, alpha or beta particles) before they're absorbed.

Hope this helps,

Burr Zimmerman

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