Question 121: Dual Nature of Matter and Radiation

Question

If a source of electromagnetic radiation having power $$15 \mathrm{~kW}$$ produces $$10^{16}$$ photons per second, the radiation belongs to a part of spectrum is.
(Take Planck constant $$h=6 	imes 10^{-34} \mathrm{Js}$$ )

Accepted Answer

$$
\begin{aligned}
& 	ext { Energy of one photon }=\frac{	ext { Power }}{	ext { Photon frequency }} \\
& \mathrm{E}=\mathrm{h} v=\frac{15 	imes 10^3}{10^{16}} \\
& \Rightarrow v=\frac{15 	imes 10^{-13}}{6 	imes 10^{-34}}=2.5 	imes 10^{21}
\end{aligned}
$$
So gamma Rays.

Answer

Gamma rays

Answer

Radio waves

Answer

Micro waves

Answer

Ultraviolet rays

Dual Nature of Matter and Radiation

If a source of electromagnetic radiation having power $15 \mathrm{~kW} produces 10^{16} photons per second, the radiation belongs to a part of spectrum is. (Take Planck constant h=6 \times 10^{-34} \mathrm{Js}$ )

Choose the correct answer: