Question
A source S1 is producing, 1015 photons per second of wavelength 5000 $\mathop A\limits^ \circ $. Another source S2 is producing 1.02 $ \times $ 1015 photons per second of wavelength 5100 $\mathop A\limits^ \circ $. Then, (power of S2)/(power of S1) is equal to