Question 32

Henry Moseley studied characteristic X-ray spectra of elements. The graph which represents his observation correctly is
Given $$\nu$$ = Frequency of X-ray emitted, $$Z$$ = Atomic number

Solution

According to Moseley’s law:

$$\sqrt{\nu} \propto Z$$

or

$$\nu \propto Z^2$$

where

$$\nu = \text{frequency of characteristic X-rays}$$

and

$$Z = \text{atomic number}$$

Therefore:

- A plot of $$\sqrt{\nu}$$ versus $$Z$$ gives a straight line.
- A plot of $$\nu$$ versus $$Z$$ gives a parabola.

Hence the correct graph is:

Option C

i.e. the graph $$\sqrt{\nu}$$ versus $$Z$$ gives a straight line.

Get AI Help

Create a FREE account and get:

Free JEE Mains Previous Papers PDF
Take JEE Mains paper tests

Henry Moseley studied characteristic X-ray spectra of elements. The graph which represents his observation correctly isGiven $$\nu$$ = Frequency of X-ray emitted, $$Z$$ = Atomic number

Solution

Get AI Help

Download resources

Henry Moseley studied characteristic X-ray spectra of elements. The graph which represents his observation correctly is
Given $$\nu$$ = Frequency of X-ray emitted, $$Z$$ = Atomic number