A radioactive sample is kept at the centre of an evacuated spherical vessel.
(a) Out of the `alpha`, `beta` and `gamma` radiations, name the radiations which are (i) safe and (ii) unsafe.
(b) Suggest two ways for more safety.
( c) Does evacuation of vessel help in safety ?
A radioactive sample is kept at the centre of an evacuated spherical vessel.
(a) Out of the `alpha`, `beta` and `gamma` radiations, name the radiations which are (i) safe and (ii) unsafe.
(b) Suggest two ways for more safety.
( c) Does evacuation of vessel help in safety ?
(a) Out of the `alpha`, `beta` and `gamma` radiations, name the radiations which are (i) safe and (ii) unsafe.
(b) Suggest two ways for more safety.
( c) Does evacuation of vessel help in safety ?
Text Solution
Verified by Experts
(a) (i) a radiations have a less penetrating power and therefore they are stopped by the walls of vessel. Thus the vessel is safe for the a radiations. (ii) The `beta` and `gamma` radiations are not stopped by the walls of vessel, so the vessel is unsafe for the `beta` and `gamma` radiations.
(b) Suggestions : (1) The sphere must have lead walls.
(2) The sphere must be of large radius.
(c) No. The vessel should not be evacuated. The air in it will help in absorbing the radiations.
(b) Suggestions : (1) The sphere must have lead walls.
(2) The sphere must be of large radius.
(c) No. The vessel should not be evacuated. The air in it will help in absorbing the radiations.
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