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उत्तर
Cathode rays are used for:
(i) Converting electrical signal into a visual signal, (ii) In television.
संबंधित प्रश्न
Answer the following questions based on a hot cathode ray tube
Name the charged particles
Write one use of cathode ray tube.
What are isobars?
Give a scientific explanation.
When the radiation coming out from a certain radioactive substance is passed through an electric field, marks are found at three places on the photographic plate placed in its path.
Explain the use of radioactive in the field of medicine, agriculture and industry.
What are cathode rays? Why are they called ‘cathode rays’? Name a material which exhibits fluorescence when cathode rays fall on it.
In a cathode ray tube state the purpose of the fluorescent screen.
Explain, why radium paint, consisting of zinc sulphide and a trace of radium salt, glows in the dark?
It is advised not to touch a radioactive substance by hand. Give reason.
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)
