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  4. If a source of electromagnetic radiation having power 15 kW produces 1016 photons per second, the radiation belongs to a part of spectrum is. (Take Planck constant h =6 × 10-34 Js )

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Q. If a source of electromagnetic radiation having power 15kW produces 1016 photons per second, the radiation belongs to a part of spectrum is. (Take Planck constant h=6×10−34Js )

JEE MainJEE Main 2023Dual Nature of Radiation and Matter

Solution:

 Energy of one photon = Power  Photon frequency 
E=hv=15×1031016
v=15×10−136×10−34=2.5×1021
So gamma Rays. Option 3