Momentum and Wavelength in Physics

The video tutorial explains the concept of De Broglie wavelength, demonstrating calculations for different particles like a ball and an electron. It covers the derivation of the De Broglie equation and discusses wave-particle duality, highlighting how matter can exhibit both wave-like and particle-like properties. The tutorial also explains the diffraction pattern of electrons and the significance of wave-like behavior in small particles.

What is the De Broglie wavelength of a 75 gram ball moving at 42 meters per second?

• 4.2 x 10^-34 meters

• 1.8 x 10^-34 meters

• 3.5 x 10^-34 meters

• 2.1 x 10^-34 meters

How do you convert the mass of a ball from grams to kilograms?

• Multiply by 1000

• Divide by 1000

• Add 1000

• Subtract 1000

What is the De Broglie wavelength of an electron moving at 5% of the speed of light?

• 48.5 picometers

• 24.2 picometers

• 36.3 picometers

• 12.1 picometers

What is the speed of light used in the calculation of the electron's wavelength?

• 4 x 10^8 meters per second

• 3 x 10^8 meters per second

• 2 x 10^8 meters per second

• 5 x 10^8 meters per second

How do you find the speed of an electron given its wavelength?

• Add the mass and wavelength

• Multiply Planck's constant by the mass

• Subtract the wavelength from Planck's constant

• Divide Planck's constant by the product of mass and wavelength

What is the speed of an electron with a wavelength of 250 nanometers?

• 4000 meters per second

• 1500 meters per second

• 3200 meters per second

• 2909 meters per second

How is the momentum of a neutron calculated from its wavelength?

• Wavelength divided by Planck's constant

• Wavelength added to Planck's constant

• Planck's constant divided by the wavelength

• Planck's constant multiplied by the wavelength

What is the momentum of a neutron with a wavelength of 1400 nanometers?

• 3.50 x 10^-28 kg m/s

• 2.25 x 10^-28 kg m/s

• 4.73 x 10^-28 kg m/s

• 5.00 x 10^-28 kg m/s

What does the De Broglie equation demonstrate about matter?

• Matter exhibits both wave-like and particle-like properties

• Matter does not exhibit any wave-like properties

• Matter only behaves as a particle

• Matter only behaves as a wave

What phenomenon demonstrates that electrons can behave as waves?

• Diffraction pattern

• Reflection pattern

• Refraction pattern

• Absorption pattern