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प्रश्न
How is a zinc sulphide screen affected when a cathode ray beam strikes it?
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उत्तर
When a cathode ray beam strikes a zinc sulphide screen, a bright spot is seen on the screen.
संबंधित प्रश्न
Answer the following questions based on a hot cathode ray tube.
State the approximate voltage used to heat the filament
A radioactive substance is oxidized. Will there be any change in the nature its radioactivity? Give a reason for your answer
Represent the change in the nucleus of a radioactive element when a β particle is emitted.
What is meant by radioactivity?
What kind of change takes place in a nucleus when a β -particle is emitted?
An element P disintegrates by α - -emission and the new element suffers two further disintegrations, both by β -emission, to form an element Q. Explain the fact that P and Q are the isotopes.
State any two uses of cathode rays.
What are ‘Becquerel rays’?
Unit of radioactivity is _______
The mean lives of a radioactive substance are 1620 and 405 years for β-emission and β-emission respectively. The time after which three fourth of a sample will decay if it is decaying both by β-emission and β-emission simultaneously will be ______ years.
(Take ln 2 = 0.693)
