Gamma Rays Are Photons with Very High Energy $500 \mathrm {~nm}$

Multiple Choice

Gamma rays are photons with very high energy. How many visible-light photons with a wavelength of $500 \mathrm {~nm}$ would you need to equal the energy of a gamma-ray photon with energy $4.1 \times 10 ^ { - 13 } \mathrm {~J}$ ?

A) $6.2 \times 10 ^ { 9 }$
B) $1.4 \times 10 ^ { 8 }$
C) $3.9 \times 10 ^ { 3 }$
D) $1.0 \times 10 ^ { 6 }$