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
  $6.111 \times 10^{-17} \ J$