Question

Some laws/processes are given in Column I. Match these with the physical phenomena given in Column II

Answer 1

Solving $List-II$

$1)$ Characteristic X-ray : In X-ray electron are exited to very high energy which emits rays and it is described by Moseley's law.

So, $\left(1\right)\to \left(A\right),\left(C\right)$

$2)$ Photoelectric effect : $E={\varphi }_{th}+K.E.$ where ${\varphi }_{th}$ is work function

So, $\left(2\right)\to \left(B\right),\left(D\right)$

Hydrogen Spectrum : Spectrum is formed due to transition of atom from one energy level to another energy level.

$4)$ $\beta$ decay : In $\beta$ decay ${}_{-1}^o\beta$ electron is emitted

So, $\left(4\right)\to \left(B\right)$