Thomson (1856-1940) confirmed this hypothesis By applying
mutually perpendicular electric and magnetic fields across the discharge
tube, J J Thomson was the first to determine experimentally the speed
Chapter Eleven
DUAL NATURE OF
RADIATION AND
MATTER
Rationalised 2023-24
275
Dual Nature of Radiation
and Matter
and the specific charge [charge to mass ratio (e/m)] of the cathode ray
particles