1.

Give the uses of radioactive isotopes in the measurement of thickness, density and level.

Answer»

Measurement of thickness, density and level:

  • It is necessary to maintain the required thickness in the manufacture of aluminium, plastic, iron sheets of differing thickness. 
  • In the manufacturing process, a radioactive substance is placed on one side and an instrument to measure radiation on the other. 
  • The radiation read by the measuring instrument varies with the thickness of the sheet. 
  • Material inside a packing can also be examined by the same technique.


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