Order of q/m ratio of proton, $\alpha $ -particle and electron is
$e > p > \alpha $
$p > \alpha > e$
$e > \alpha > p$
None of these
The cathode rays have particle nature because of the fact that
Which is not true with respect to the cathode rays
Particle nature and wave nature of electromagnetic waves and electrons can be shown by
Write information about negative electric charge emitted from metals when $UV$ light is incident on them or metals are heated.
In Thomson's method of determining $e/m$ of electrons