CAIE IGCSE Physics 5.2.2.2 Alpha Beta and Gamma Questions

OR

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beta
\multicolumn{3}{|c|}{alpha would be stopped by soil and not reach detector

OR beta has sufficient range to be detected above

ground

OR

alpha and beta stopped by soil before reaching detector

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gamma would pass through intact pipe as well cracked pipe so no difference detected OR beta stopped by intact pipe so variation between piped water and escaped water can be detected

gamma is only radiation that will reach detector through

OR soil OR less gamma reaches detector through solid pipe