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प्रश्न
Arrange the α, β, and γ radiation in ascending order of their biological damage. Give reason.
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उत्तर
α < β < γ
- An α-particle rapidly loses its energy as it moves through a medium, and therefore its penetrating power is quite small. It can penetrate only through 3 - 8 cm in air. It can easily be stopped by a thin card sheet or a thick paper.
- The penetrating power of β-particles is greater than that of the α-particles. They can pass through nearly 5 m in air, through thin card sheet, and even through thin aluminum foil, but a 5 mm thick aluminum sheet can stop them.
- Whereas, the penetrating power of γ-rays is high. It is about 104 times that of α-particles and 102 times that of β-particles. They can pass through 500 m in air or through a 30 cm thick sheet of iron. A thick sheet of lead is required to stop them.
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संबंधित प्रश्न
A radioactive source emits three types of radiations.
Name the radiations which are deflected by the electric field.
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.
State the speed of each of α, β and γ radiations.
A radioactive substance emits radiations ______.
Compare the ionising powers of α, β and γ radiations.
What are α-and β-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?
Which of the following radiations suffer maximum deflection in a magnetic field?
