If a source of power 4 kW produces

Question:

If a source of power $4 \mathrm{~kW}$ produces $10^{20}$ photons/second, the radiation belongs to a part of the spectrum called

  1. microwaves

  2. y-rays

  3. X-rays

     

  4. ultraviolet rays

Correct Option: , 3

Solution:

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