A radioactive source emits three types of radiations. Name the radiation which has the lowest ionizing power.

a l p h a

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b e t a

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g a m m a

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None of the above

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Solution

The correct option is C $g a m m a$
The lowest ionizing power of the three is of gamma radiation which carries no electric charge and has virtually no mass, so not much of a 'punch' when colliding with an atom.

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