|Reason || ||Details (roll over the word 'show' for each reason).|
Try to think of the reason first.
|the radiation can penetrate the walls of the mould ||show || |
gamma radiation can pass through the metal and water of the mould; beta radiation would be absorbed by the mould and would give very low readings; alpha particles, light and sound wouldnt get through the mould at all and would give no reading, however much steel was in the mould.
|the intensity is reduced by thick steel (in the mould) ||show || |
the amount of radiation getting through depends on the depth of steel in the mould; the deeper the steel the more radiation gets absorbed and the smaller the reading.
|it gives an instant measurement ||show || |
the radiation is constantly being monitored so the readings are being taken all the time and will change the second that the level of steel changes.
|it doesnt damage or use up any of the steel ||show || |
The radiation has no effect on the steel and can monitor it as it continuously passes by as it is impossible to sample the steel within the mould (it would melt any probe).
|the electrical signal can easily be fed into a computer ||show || |
The computer calculates the flow rate and can adjust the amount being fed in to keep everything in balance.