Question

What did the independence of \[e/m\] from cathode material and gas suggest?

Options

• The quantisation of the speed of light

• The dependence of specific charge on the type of glass

• The universality of cathode ray particles

• The absence of negatively charged particles in metals

Answer 1

The same \[e/m\] value was found despite changes in cathode material or gas. These observations suggested the universality of cathode ray particles.