Same chapter2 marksDifficulty: Easy
Define the half-life of a radioactive substance.
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2 marksDifficulty: Easy
Arrange alpha, beta and gamma radiation in order of increasing penetrating power and of increasing ionising power.
Original Khojo Papers practice question — not from a past board paper.
Answer
In increasing penetrating power the order is alpha, beta, gamma. In increasing ionising power the order is gamma, beta, alpha.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The two orders are the reverse of each other: a radiation that ionises strongly loses its energy quickly and so does not penetrate far.
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