English

What Are α-and β-radiations?

Advertisements
Advertisements

Question

What are α-and β-radiations?

Short/Brief Note
Advertisements

Solution

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.

shaalaa.com
  Is there an error in this question or solution?

RELATED QUESTIONS

A radioactive source emits three types of radiations.

Name the three radiations.


In following Figure shows a radioactive source S in a thick lead walled container having a narrow opening. The radiations pass through an electric field between the plates A and B.

  1. Complete the diagram to show the paths of α, β and γ radiations.
  2. Why is the source S kept in a thick lead walled container with a narrow opening?
  3. Name the radiation which is unaffected by the electrostatic field.
  4. Which radiation is defleced the most. Given reason.
  5. Which among the three radiations causes the least biological damage?

What is the composition of α, β and γ radiations?


A radioactive substance emits radiations ______.


Compare the penetrating powers of α, β and γ-radiations.


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.

  1. Arrange them in ascending order of ionising power.
  2. Which of the above will pass undeviated if subjected to an electric field?
  3. 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?


Arrange the α, β and γ radiations in ascending order of their penetrating power.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×