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In this lesson, we will learn how to calculate the de Broglie wavelength of high-energy particles and macroscopic objects.

Q1:

The de Broglie wavelength of a neutron is 0.0500 nm.

What is the speed of this neutron?

What is the energy of this neutron?

Q2:

What is the velocity of a 0.400-kg billiard ball if its wavelength is 7.50 fm?

Q3:

An X-ray photon has an energy of 125 keV, and a neutron has the same momentum as the photon.

Find the momentum of the photon.

Find the velocity of the neutron with the same momentum.

What is the neutron’s kinetic energy?

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