What happens to the de Broglie wavelength of an electron if its momentum is doubled?

A photon and an electron have the same de Broglie

wavelength. Choose the true statement.

Determine the de Broglie wavelength of a neutron (m = 1.67 x 10^-27kg) which has a speed of 5.0 m/s.

An electron and a proton are accelerated through a potential difference of 1.2 kV. What is the ratio of the de Broglie wavelength of the electron to the proton?

Which of the following provides evidence of the wave nature of matter?

In 1923 de Broglie suggested that an electron of momentum p has properties corresponding to a wave of wavelength λ.

Which of the following graphs correctly shows the relationship between λ and p ?

Infrared light shined on a metal initially emits no electrons.  What is the quantum prediction if the intensity of the light is increased?

Energy absorbed by an electron is used in 

A hypothetical atom has only 3 possible energy states (including the ground state). Assuming all transitions are possible, how many spectral lines can this atom produce?

No electrons are emitted from metal surfaces below ____________ frequency.