Question

Which choice below is correct about the de Broglie wavelength?

a. The de Broglie wavelength provides a reasonable approximation of when quantum effects become important.

b. Electrons exhibit a de Broglie wavelength, but protons do not.

c. The larger the mass of a particle, the longer its de Broglie wavelength will be.

d. Shorter de Broglie wavelengths correspond to particles with lower speeds.

Answer 1

a. The de Broglie wavelength provides a reasonable approximation of when quantum effects become important.

True

b. Electrons exhibit a de Broglie wavelength, but protons do not. In theory they could, but protons do not move, so there is no sense in calcualteing wavlength, so this is FALSE

c. The larger the mass of a particle, the longer its de Broglie wavelength will be.

WL = h/(mv) therefore, the higher mass, the lwoer WL, this is false

d. Shorter de Broglie wavelengths correspond to particles with lower speeds.

if WL is hosrt, then particles must be fast, this is false