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प्रश्न
Explain, why radium paint, consisting of zinc sulphide and a trace of radium salt, glows in the dark?
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उत्तर
Radium is a radioactive substance. It gives out radioactive radiations which show fluorescence in zinc sulphide. Zinc sulphide is a fluorescent material, so it glows in dark.
संबंधित प्रश्न
State three factors on which the rate of emission of electrons from a metal surface depends
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3) Biological effect
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What do you mean by Atomic mass
A radioactive nucleus `""_"Z"^"A"` X first emits a beta particle and then an alpha particle to give the resulting nucleus `""_"Q"^"P"` Y What will be the values of P and Q in terms of A and Z?
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Name the radiation which has the highest ionizing power.
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