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प्रश्न
Mention four properties of Becquerel rays.
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उत्तर
The four properties of Becqueral rays are:
(i) They have penetrating power.
(ii) They affect a photographic plate.
(iii) They can ionize a gas or air through which they pass.
(iv) They are deflected by electric and magnetic fields.
संबंधित प्रश्न
What are free electrons?
Why is a cathode ray tube evacuated to a low pressure?
State two similarities and two dissimilarities between the γ-rays and X-rays.
What kind of change takes place in a nucleus when a β -particle is emitted?
What happens to the position of an element in the periodic table when it emits an alpha particle
Name the three main parts of a Cathode Ray Tube.
Justify with reason, whether the following nuclear reactions are allowed or not.
\[\ce{^A_Z X -> ^A_{Z + 1}Y + ^0_{-1}β}\]
Unit of radioactivity is _______
Assertion (A): Hydrogen atom consists of only one electron but its emission spectrum has may lines.
Reason (R): Only Lyman series is found in the absorption spectrum of hydrogen atom whereas in the emission spectrum, all the series are found.
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.
