In order for a proton to have the same momentum

Q39.1

In order for a proton to have the same momentum as an electron,

A the proton must have a shorter de Broglie wavelengthA. the proton must have a shorter de Broglie wavelength than the electron.

B. the proton must have a longer de Broglie wavelength p g g gthan the electron.

C. the proton must have the same de Broglie wavelength as the electron.

D. not enough information given to decide

Same diffraction angles if (spacing between atoms in plane)/elec=2*(spacing between planes)/xray

Q39.4

An electron is free to move anywhere within a cube yof copper 1 cm on a side. Compared to an electron within a hydrogen atom, the electron in copper

A. has a much smaller uncertainty in momentum.

B. has a slightly smaller uncertainty in momentum.B. has a slightly smaller uncertainty in momentum.

C. has the same uncertainty in momentum.

D has a slightly larger uncertainty in momentumD. has a slightly larger uncertainty in momentum.

E. has a much larger uncertainty in momentum.