In this worksheet, we will practice deriving the de Broglie wavelength and calculating and interpreting its value for particles of known mass and velocity.

Q1:

Calculate the wavelength of an electron traveling at a velocity of m/s.

A
m

B
m

C
m

D
m

E
m

Q2:

What is the de Broglie wavelength of a 100 g baseball traveling at a velocity of 35.0 m/s?

A
m

B
m

C
m

D
m

E
m

Q3:

An electron has a mass of
kg,
and the mass of a proton (p) is kg.
Assuming the electron and the proton move at the same speed of 300 m/s,
which of the following is a true statement concerning the de Broglie wavelengths?

A

B

C

D

Q4:

Calculate the de Broglie wavelength for an electron moving at a speed of m/s.
Use kg for the mass of an electron and J⋅s
for the Planck constant.

A
m

B
m

C
m

D
m

Q5:

Calculate the de Broglie wavelength of a 0.1400 kg baseball moving at a speed of
40.00 m/s. Use a value of
for Planck’s constant.

A
m

B
m

C
m

D
m

Q6:

An electron has a mass of kg,
and the mass of a proton (p) is kg.
Assuming the electron and the proton move at the same speed of 500 m/s,
which of the following is a true statement concerning the de Broglie wavelengths?

A

B

C

D

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