Question

Compare the wavelengths of an electron and a proton

Answer 1

Answer:

Explanation:

The de Broglie wavelength of a particle is inversely proportional to its momentum p = m v; since a proton is about 1800 times more massive than an electron, its momentum at the same speed is 1800 times that of an electron, and therefore its wavelength 1800 times smaller. The electron has the longer wavelength.

The doubt comes in as the photon does not have mass ; the momentum of a photon is defined as = E/c where E is its energy and c is the speed of light.