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प्रश्न
What is the value of the speed of gamma radiations in air or vacuum?
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उत्तर
Speed of γ radiation = 3 × 108 m/s in air or vacuum.
संबंधित प्रश्न
Answer the following questions based on a hot cathode ray tube.
What will happen to the beam when it passes through the electric field?
State three factors on which the rate of emission of electrons from a metal surface depends
Why is a cathode ray tube evacuated to a low pressure?
What is meant by radioactivity?
What kind of change takes place in a nucleus when a β -particle is emitted?
In following fig. shows a mixed source S of alpha and beta particles in a thick lead container. The particles pass through a magnetic field in a direction perpendicular to the plane of paper (inwards as shown by x). State and show in the diagram how the particles get affected.
A radioactive substance is oxidized. What changes would you expect to take place in the nature of radioactivity? Explain your answer.
Name the three main parts of a Cathode Ray Tube.
A certain nucleus has a mass number 20 and atomic number 9. Find the number of neutrons and protons present in it.
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.
