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प्रश्न
State following four properties each of α, β and γ radiations:
- Nature,
- Charge,
- Mass and
- Effect of electric field.
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उत्तर
| Property | α - particle | β - particle | γ - particle |
| Nature | Stream of positively charged particles, i.e. helium nuclei | Stream of negatively charged particles, i.e. energetic electrons. | Highly energetic electromagnetic radiation. |
| Charge | Positive charge (Two times that of a proton) = + 3.2 x 10-19 C (or +2e) | Negative charge = - 1.6 x 10-19 C (or -e) | No charge |
| Mass | Four times the mass of proton i.e., 6.68 x 10-27 kg | Equal to the mass of electron, i.e. 9.1 x 10-31 kg | No mass (Rest mass is zero) |
| Effect of electric field | Less deflected | More deflected than alpha particles but in direction opposite to those of α particles | Unaffected |
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संबंधित प्रश्न
A radioactive source emits three types of radiations.
Name the radiations which are deflected by the electric field.
The diagram in figure shows a radioactive source S placed in a thick lead walled container. The radiations given out are allowed to pass through a magnetic field. The magnetic field (shown as ×) acts perpendicular to the plane of paper inwards. Arrows shows the paths of the radiation A, B and C.
- Name the radiations labelled A, B and C.
- Explain clearly how you used the diagram to arrive at the answer in part (a).
In following Figure shows a mixed source R of alpha and beta particles in a thick lead walled container. The particles pass through a magnetic field in a direction perpendicular to the plane of paper inwards as shown by ×.
- Show in the diagram how the particles get affected.
- Name the law used in part (a).
[Hint: Alpha particles will deflect to the left while beta particles to the right]
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.
State the speed of each 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.
Which nuclear radiation will travel undeviated in an electric field?
Arrange the α, β and γ radiations in ascending order of their penetrating power.
