"எதிர்மின்னி" பக்கத்தின் திருத்தங்களுக்கிடையேயான வேறுபாடு

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{{Infobox Particle

|image = [[படிமம்:Crookes tube-in use-lateral view-standing cross prPNr°11.jpg|280px|alt=A glass tube containing a glowing green electron beam]]

|caption = Experiments with a Crookes tube first demonstrated the particle nature of electrons. In this illustration, the profile of the cross-shaped target is projected against the tube face at right by a beam of electrons.<ref name="Dahl1997" />