The energy of a photon can be calculated using the equation:
E = hc/λ
Where: E is the energy of the photon, h is Planck's constant (approximately 6.626 x 10^-34 J·s), c is the speed of light in a vacuum (approximately 3.00 x 10^8 m/s), and λ is the wavelength of the photon.
Substituting the given values:
λ = 5 x 10^-4 m
E = (6.626 x 10^-34 J·s * 3.00 x 10^8 m/s) / (5 x 10^-4 m)
Simplifying the expression:
E = 3.9768 x 10^-19 J
Therefore, the energy of the photon is approximately 3.9768 x 10^-19 joules.