Photon picture of light

2010 AIPMT-PRE 1 question

1. 1 Dual Nature of Radiation and Matter
   A source $S_1$ is producing $10^{15}$ photons per second of wavelength 5000 Å. Another source $S_2$ is producing $1.02\times10^{15}$ photons per second of wavelength 5100 Å. Then (power of $S_2$)/(power of $S_1$) is equal to
   A 0.98 B 1.00 C 1.02 D 1.04
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