ICSE Class 10 Answered
A mass of lead is embedded in a block ofaluminium 2mm thick.radiations from a radioactive substance incident on the side of block produce aa shadow on a dlourescent screen placed beyond the block.the shadow of block of aluminium is fainter than the shadow of lead .
Give reason for the difference in detail and simple language
Asked by lovemaan5500 | 23 Dec, 2017, 07:14: AM
Expert Answer
Aluminium is low density material. Lead is high density material. Attenuation of γ-radiation from low density materials is less and more radiation will reach flourescent screen. Hence the shadow of aluminium part is fainter. Attenuation of γ-radiation from high density materials is more and less radiation will reach flourescent screen. Hence the shadow of lead part is darker.
Answered by | 23 Dec, 2017, 10:41: AM
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