What can an electric field deflect?
What can an electric field deflect? Correct Answer alpha particle
Types of radioactive rays:
- Radioactive rays are classified based on the behavior of the radioactive rays in electric and magnetic fields.
- Three types: α rays, β rays, and γ rays.
The separation of the three types of radioactive rays by the action of an electric field is given below:
Additional Information
The table below shows the characteristics of radioactive rays:
|
α rays |
β rays |
γ rays |
|
|
Charge |
Positively charged (+ve) |
Negatively charged (-ve) |
Uncharged |
|
Nature |
α-rays consist of streams of +vely charged particles called α particles. Each α-particle has 2 units of +ve charge and 4 amu mass. Each α-particle is a helium nucleus. |
Consist of - vely charged particles called β-particles. Each β-particle has a mass equal to an electron and carries one unit of -ve charge. Each β-particle is an electron. |
γ-rays consist of electromagnetic radiations of very short wavelength.
|
|
Velocity |
α-rays travel with about one-tenth that of the velocity of light. |
β-rays travel with velocities ranging from 33-99% of the velocity of light. |
γ-rays travel with the velocity of light. |
|
Penetrating power |
Least penetrating power. |
β-rays are 100 times more penetrating than α rays. |
γ-rays have the highest penetrating power among the three rays. |
|
Ionizing power |
Because of the high momentum they possess, α-rays can cause ionization of gases. |
Because of smaller masses of β-particles, the ionizing power is less than α rays. |
γ-rays have the least ionizing power among the three types of radioactive rays. |
|
Action on a photographic plate |
α-rays can affect a photographic plate. |
β-rays can affect a photographic plate. |
γ-rays can affect a photographic plate. |