Photon 1 has a wavelength of

PHYSICS · Single correct · A Level · Physics · Particles and radiation · Particles and radiation

Problem

400\,\text{nm}

, and photon 2 has a wavelength of

800\,\text{nm}

. What is the ratio

E_1/E_2

of their energies? (a) 0.50 (b) 4.0 (c) 2.0 (d) 1.0