How much energy does a single photon of an argon ion laser emit if the wavelength of this photon is 489 nm?

Question

Quizplus · Accepted Answer

The energy of a photon can be calculated using the equation E = hc/λ, where h is Planck's constant (6.626×10^-34 J·s), c is the speed of light (3.00×10^8 m/s), and λ is the wavelength in meters. Converting 489 nm to meters (489 nm = 489×10^-9 m) and substituting the values, we get E ≈ 4.06×10^-19 J.

How Much Energy Does a Single Photon of an Argon