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

Multiple Choice

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 × 10−³⁴ J⋅s and c = 3.00 × 10⁸ m/s) .

A) 3.14 × 10−¹⁹ J
B) 5.40 × 10−¹⁹ J
C) 7.62 × 10−¹⁹ J
D) 1.15 × 10−¹⁸ J