Question

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

• A. Micro waves
• B. Radio waves
• C. Gamma rays
• D. Ultraviolet rays

Answer 1

Answer: (C)

Gamma rays

Answer 2

Energy of one photon = Photon frequency Power ​
E=hv=101615×103​
v=6×10−3415×10−13​=2.5×1021
So gamma Rays. Option 3