Royal Institution lecture programme, 1897.
3 4 c m
40cm
actual image size: 32cm x 26cm

Royal Institution lecture programme, 1897.

© Science Museum / Science & Society Picture Library

Description

Part of the pamphlet produced during the month J J Thomson (1856-1940) gave a lecture on cathode rays. After graduating from Trinity College, Thomson continued to work at Cambridge University and in 1896 began experiments on cathode rays. In Britain physicists argued these rays were particles, but German physicists maintained they were a type of electromagnetic radiation. Thomson showed that cathode rays were particles with a negative charge and much smaller than an atom. These particles were later renamed electrons.
 

Image Ref.

10328909
 

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