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प्रश्न
It is advised not to touch a radioactive substance by hand. Give reason.
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उत्तर
The reason is that the radiations (α, β and γ) emitted by a radioactive substance have large penetrating power.
संबंधित प्रश्न
What is thermionic emission?
State any two precautions to be taken while handling radioactive substances
Radiations given out from a source when subjected to an electric field in a direction perpendicular to their path are shown below in the diagram. The arrows show the path of the radiation A, B and C. Answer the following questions in terms of A, B and C.
1) Name the radiation B which is unaffected by the electrostatic field.
2) Why does the radiation C deflect more than A?
3) Which among the three causes the least biological damage externally.
4) Name the radiation which is used in carbon dating.
An electromagnetic radiation is used for photography in fog. [2]
(i) Identify the radiation.
(ii) Why is this radiation mentioned by you, ideal for this purpose ?
A nucleus is \[\ce{^24_11 Na}\] β-radioactive.
Write the equation represent β-decay.
State any two uses of cathode rays.
In a cathode ray tube state the purpose of covering cathode by thorium and carbon.
A radioactive element is placed in an evacuated chamber. Then the rate of radioactive decay will ______.
Assertion (A): The force of repulsion between atomic nucleus and α-particle varies with distance according to inverse square law.
Reason (R): Rutherford did α-particles scattering experiment.
