Advertisements
Advertisements
प्रश्न
Advertisements
उत्तर
Artificial radioactive substances can be produced by bombarding lighter nuclides with alpha particles, protons and neutron. The radioactive substances produces in this manner are called radioisotopes.
Radioisotopes can be used as:
(i) Rays from Radium produce satisfactorily improvement in skin diseases.
(ii) Radioactive Sulphur S35 helps to study advantages and disadvantages of fungicides.
APPEARS IN
संबंधित प्रश्न
When does the nucleus of an atom tend to become radioactive?
In a cathode ray tube state:
(i) the purpose of covering cathode by thorium and carbon.
(ii) the purpose of the fluorescent screen.
(iii) how is it possible to increase the rate of emission of electrons.
Radiations given out from a source when subjected to an electric field in a direction perpendicular to their path are shown below in the diagram. The arrows show the path of the radiation A, B and C. Answer the following questions in terms of A, B and C.
1) Name the radiation B which is unaffected by the electrostatic field.
2) Why does the radiation C deflect more than A?
3) Which among the three causes the least biological damage externally.
4) Name the radiation which is used in carbon dating.
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.
What kind of change takes place in a nucleus when a β -particle is emitted?
Explain the use of radioactive in the field of medicine, agriculture and industry.
In a cathode ray tube state the purpose of the fluorescent screen.
What is the value of the speed of gamma radiations in air or vacuum?
It is advised not to touch a radioactive substance by hand. Give reason.
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 ______.
