[boydog]

a problem about the uses of radioisotopes

"you work in a beer factory. You want to ensure that each bottle of beer on the converyor belt is filled up to the correct level (and not below that level) before the cap is fixed. You fix a radioisotope at the required height..."

the problem stops there, and i have to illustrate the steps that i will take for the experiement.

any ideas anyone?

[pantone159]

I don't want any radio-isotopes in my beer, thank you very much.  

[Mitch]

Can't you just look into the bottle to see if its full?

[boydog]

the radioisotope is supposed to check if the beer is filled to the exact level. our naked eyes won't be able to tell.

what i need to find out is how this happens, or the steps that illustrate this process

[Mitch]

I don't think radioisotopes can do that. Since, theyemit radiation in all directions equally.

[Borek]

There is source and a sensor. Measured radiation will be smaller when the bottle is between source and sensor, and even smaller if the bottle is filled up above the line between source and the sensor.

I am not talking about practicality of the setup, just that's what I assume is the general idea behind the question.