How many photons of light with frequency 5.50 x 10 15 Hz are required to provide 1 kJ of energy?
A. 1.65 x 10 44 photons
B. 2.74 x 10 20 photons
C. 3.64 x 10 -16 photons
D. 3.64 x 10 -18 photons
E. 4.56 x 10 -4 photons
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