The energies of two photons you might detect emitted by hydrogen atoms are 10.2 and 2.1 eV. Which photon has the longest wavelength?

Question

Quizplus · Accepted Answer

The wavelength of a photon is inversely proportional to its energy, according to the equation E=hc/λ, where E is energy, h is Planck's constant, c is the speed of light, and λ is the wavelength. Therefore, the photon with the lowest energy (2.1 eV) will have the longest wavelength.

The Energies of Two Photons You Might Detect Emitted by Hydrogen