Question

Define half-life of a radioactive sample. Which of the following radiations: $$\alpha-rays, \beta-rays$$ and $$\gamma-rays$$
(i) are similar to X-rays
(ii) are easily absorbed by matter
(iii) travel with the greatest speed
(iv) are similar in nature of cathode rays ?

Answer 1

Half-life: The half-life of a radioactive sample is defined as the time in which the mass of sample is left one half of the origin mass.
(i) $$\gamma$$-rays are similar to X-rays
(ii) $$\alpha$$-rays are easily absorbed by matter.
(iii) $$\gamma$$-rays travel with greatest speed
(iv) $$\beta$$-rays are similar to cathode rays.