A 25w bulb emits monochromatic light of wavelength of 0.57um calculate the rate of emission of quant per second
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Answer: refer to the image
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Explanation:
The energy of one photon is
E=
λ
hc
=
0.57×10
−6
6.626×10
−34
Js×3×10
8
m/s
=3.487×10
−19
J .
25 watt corresponds to 25 J per second.
The number of photons emitted per second is
3.487×10
−19
25
=7.17×10
19
/s.
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