Based on https://commons.wikimedia.org/wiki/File:HD.6D.635_(12000265314).jpg
Description: Liquid hydrogen bubble chamber photograph of a negatively-charged pi meson interacting with a proton (hydrogen nucleus) to produce a positive K meson, a neutral meson, shown by the dotted line, a negative meson, and a neutron, whose path is not
shown (neutral or uncharged particles do not leave tracks).
Source: HD.6D.635
Author: ENERGY.GOV
විස්තරයLorentz force on charged particles in bubble chamber - HD.6D.635 (12000265314).svg
English: Photograph of liquid hydrogen bubble chamber tracks of charged particles. The magnetic field points downward. Positively and negatively charged particles spiral in opposite directions.