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The picture shows the typical path of an electron, which
was knocked out from the electron shell of an atom of the liquid in the
bubble chamber by the photoelectric effect. As the absorbed energy is low
compared to the energy of the incoming particle, it does not have a
measurable effect on the trace of it. These signatures, of which you can find many in a single
bubble chamber photo, are very helpful indicators, which give you
information about direction of the magnetic field, which applies for the
photo. You can also at a glance see in which direction the path
of a charged particle is curved. In this example, negatively charged
particles curve to the left, positively charged particles curve to the
right. |
