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de Broglie - Multiple Choice Questions

Q1. Electrons and protons in two beams are travelling at the same speed.

The beams are diffracted by objects of the same size.

Which correctly compares the de Broglie wavelength λe of the electrons with the de Broglie wavelength λp of the protons and the width of the diffraction patterns that are produced by these beams?

  Comparison of de Broglie wavelength
Diffraction Pattern
A
λe>λp
 electron beam width > proton beam width
B
λe<λp
 electron beam width > proton beam width
C
λe>λp
 electron beam width < proton beam width
D
λe<λp
 electron beam width < proton beam width