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प्रश्न
What are the types of emission?
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उत्तर
There are four types of emissions:
(i) Thermionic emission. (ii) Photoelectric emission.
(iii) Field emission. (iv) Secondary emission.
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संबंधित प्रश्न
A nucleus `""_11^24Na` emits a beta particle to change into Magnesium (Mg)
(i) Write the symbolic equation for the process.
(ii) What are numbers 24 and 11 called?
(iii) What is the general name of `""_12^24Mg `with respect to `""_11^24Na` ?
A radioactive substance is oxidized. What changes would you expect to take place in the nature of radioactivity? Explain your answer.
State three safety precautions that you would take while handling the radioactive substances.
Why are materials of low work function preferred as thermionic cathode materials?
What do you understand by the term radioactivity?
Name the Different Radiations Which Are Emitted by the Radioactive Substances.
Are all the radiations mentioned by you, emitted in a single radioactive decay?
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.
A radioactive material decays by simultaneous emissions of two particles with half-lives of 1400 years and 700 years respectively. What will be the time after which one-third of the material remains? (Take In3 = 1.1)
