A radio transmitter radiates $1 kW$ power at a wavelength $198.6 $ metres. How many photons does it emit per second
A radio transmitter radiates $1 kW$ power at a wavelength $198.6 $ metres. How many photons does it emit per second
- A
${10^{10}}$
- B
${10^{20}}$
- C
${10^{30}}$
- D
${10^{40}}$
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