Helium-neon laser light has a wavelength in air of 632.8 nm.What is the energy of a single photon in the beam? (h = 6.626 x 10^-34 J*s and c = 3.00 x 10⁸ m/s). A)3.14 x 10^-19 J B)5.40 x 10^-19 J C)7.62 x 10^-19 J D)1.15 x 10^-18 J

Question

Quizplus · Accepted Answer

The energy of a photon is given by E = hc/λ. Substituting the given values: E = (6.626 x 10^-34 J·s)(3.00 x 10^8 m/s) / (632.8 x 10^-9 m) = 3.14 x 10^-19 J.

Helium-Neon Laser Light Has a Wavelength in Air of 632