An excited hydrogen atom emits light in the ultraviolet region at a frequency of $2.47 \times 10^{15} \ Hz$. Calculate the energy of a single photon. (Given: $h = 6.63 \times 10^{-34} \ J \cdot s$)
- A$8.041 \times 10^{-40} \ J$
- B$2.680 \times 10^{-19} \ J$
- C$1.640 \times 10^{-18} \ J$
- D$6.111 \times 10^{-17} \ J$
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