Question text
37 The diagram shows how the thickness of paper is measured during manufacture. If the sheet is too thick, fewer beta-particles can reach the detector. source of rollers paper pulp beta-particles sheet of paper detector Why are beta-particles used for this purpose? A Alpha-particles are all stopped by the paper. B Alpha-particles make the paper radioactive. C Gamma radiation is all stopped by the paper. D Gamma radiation is only produced by sources with a short half-life.
37 The diagram shows how the thickness of paper is measured during manufacture.
If the sheet is too thick, fewer beta-particles can reach the detector.
source of
rollers
paper pulp beta-particles
sheet
of paper
detector
Why are beta-particles used for this purpose?
A Alpha-particles are all stopped by the paper.
B Alpha-particles make the paper radioactive.
C Gamma radiation is all stopped by the paper.
D Gamma radiation is only produced by sources with a short half-life.
Select your answer: