Advertisements
Advertisements
प्रश्न
Explain, why radium paint, consisting of zinc sulphide and a trace of radium salt, glows in the dark?
Advertisements
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
How can they be made to leave the metal surface? (State any two ways)
Name the unit in which the work function of a metal is expressed.
A radioactive source emits three types of radiations.
Name the radiation which has the highest ionizing power.
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.
What are the types of emission?
How is a zinc sulphide screen affected when a cathode ray beam strikes it?
The count rate of activity of a radioactive sample of a very large population decreased from 1024 to 128 in 3 minutes. Then the rate of disintegration at the end of 5 minutes is ______.
When an α-particle of mass m moving with velocity ν bombards on a heavy nucleus of charge Ze, its distance of closest approach from the nucleus depends on m as:
Which type of radioactive emission is strongly ionising in nature?
Which of the following correctly lists the three major types of radioactive decay found in nature?
