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प्रश्न
In a cathode ray tube state the purpose of the fluorescent screen.
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उत्तर
Fluorescent screen helps to obtain images on the screen by converting electrical signals to light (or) visual signals by ionizing radiations to light waves.
संबंधित प्रश्न
Name a gas caused by the Greenhouse effect
State any two precautions to be taken while handling radioactive substances.
Give one example of isobars.
What happens to the mass number of an element when (i) an α -particle, (ii) a β -particle, and (iii) γ -radiation is emitted?
What kind of change takes place in a nucleus when a β -particle is emitted?
Draw a diagram of a simple atom showing the nucleus and electrons. In this atom:
(a) What type of charge will there be on the nucleus?
(b) What is the value of this charge?
In a cathode ray tube state the purpose of covering cathode by thorium and carbon.
Name the Different Radiations Which Are Emitted by the Radioactive Substances.
Are all the radiations mentioned by you, emitted in a single radioactive decay?
A certain nucleus has a mass number 20 and atomic number 9. Find the number of neutrons and protons present in it.
State three common properties of beta rays and cathode rays.
