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प्रश्न
What are α-and β-radiations?
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उत्तर
α radiations are positively charged particles with charge + 2e and mass 4mp where e is electronic charge (i.e., charge on a proton) and mp is the mass of a proton.
β radiations are negatively charged particles (i.e., electrons) with charge – e and mass 1/1836 times the mass of a proton.
γ-radiation are electromagnetic waves of wavelength in the range 0.001 Å.
संबंधित प्रश्न
A radioactive source emits three types of radiations.
Name the three radiations.
A radioactive source emits three types of radiations.
Name the radiations which are deflected by the electric field.
Explain why alpha and beta particles are deflected in an electric or a magnetic field, but gamma rays are not deflected in such a field.
Is it possible to deflect γ - radiations in a way similar to α and β -particles, using the electric or magnetic field? Give reasons.
Arrange the α, β, and γ raditions in ascending order of their ionising powers.
Arrange the α, β, and γ radiation in ascending order of their biological damage. Give reason.
Compare the ionising powers of α, β and γ radiations.
The figure shows a radioactive source S placed in a thick-walled lead container. The radiations given off pass through a magnetic field acting in direction perpendicular to the plane of paper inwards as shown by X. Copy the diagram and show the path of radiations. Explain why the source is kept in a thick-walled lead container.
A beam of α, β and γ rays is travelling through a certain region in space.
- Arrange them in ascending order of ionising power.
- Which of the above will pass undeviated if subjected to an electric field?
- With respect to your answer to part (b) above, what will be the change in the nucleus of an atom after such a ray is emitted.
Which nuclear radiation will travel undeviated in an electric field?
