Which of the following particles has the longest wavelength? A)a photon with a frequency of 3 $\times$ 10¹⁹ Hz B)a photon with an energy of 2 $\times$ 10^-13 J C)an electron with a momentum of 6.6 $\times$ 10^-21 kg · m/s D)a proton with a momentum of 6.6 $\times$ 10^-21 kg · m/s E)all four have the same wavelength

Question

Quizplus · Accepted Answer

The wavelength of a particle is inversely proportional to its momentum, which is given by Planck's constant divided by its frequency. Thus, the particle with the smallest momentum and longest wavelength is the one with the lowest frequency, which is photon A.

Which of the Following Particles Has the Longest Wavelength? A)a ×\times×

Which of the Following Particles Has the Longest Wavelength?
A)a $\times$