Question

If a source of power 4 kW Produces ${10}^{20}$ photon/ second the radiation belongs to apart from the spectrum called

• A. $y-rays$
• B. X-rays
• C. ultraviolet rays
• D. microwaves

Answer 1

The correct option is B X-rays

$4\times {10}^3={10}^{20}\times hv$

Where $V=$frequency

$\begin{array}{c}V=\frac{4\times {10}^3}{{10}^{20}\times 6.023\times {10}^{-34}}\\ V=6.64\times {10}^{16}Hz\end{array}$

This frequency lie in the bond of $X-rays$.