F5 Chapter 7 Quantum Physics

Max Planck's great discovery is that radiant energy is emitted in packets known as

• Quanta

• Electron

• Work function

• Stopping voltage

Black body is

• a body that is unable to absorb all electromagnetic radiation.

• a body that is able to absorb all electromagnetic radiation.

• a body that cannot emits thermal radiation.

• a body that emits wave with low frequency.

What is the relationship between momentum of a particle and wavelength?

• the wavelength of the particle is inversely proportional to the momentum of the particle.

• the momentum of the particle is directly proportional the the wavelength of the particle.

• the wavelength of the particle decreases linearly with the momentum of the particle

• the longer the wavelength of the particle, the greater the momentum of particle.

Which of the following is true for photoelectric effect?

• The kinetic energy of photoelectrons does not depend on the intensity of light.

• The kinetic energy of photoelectron depend on the intensity of light.

• The greater the frequency, the lower the kinetic energy.

• The emission of electrons from the surface of metal requires heating process.