The wavelength of X rays is shorter than the wave length of infrared rays. Which of the following is true?
A) X rays have more energy per photon than infrared rays have.
B) X rays have a smaller value for Planck's constant than infrared waves have.
C) X rays have a different absorption spectrum than infrared waves have.
D) X rays and infrared waves have the same frequency.
E) Infrared waves are in the ground state, whereas X rays are in the excited state.

Question

Quizplus · Accepted Answer

The energy of a photon is directly proportional to its frequency and inversely proportional to its wavelength. Since X-rays have shorter wavelengths than infrared rays, they have higher frequencies and therefore more energy per photon.

The Wavelength of X Rays Is Shorter Than the Wave