Warm Up

Warm Up

Modules 9 & 10

• Failure of Classical Mechanics

• Photoelectric Effect

Multiple Choice

The work function of a silver surface is 4.73 eV. Two photons of 2.5 eV each hit the silver. What happens? (Failures of Classical Mechanics – Photoelectric Effect)

• One electron is released from the silver surface, with kinetic energy of about

  0.47 eV.

• Two electrons are released from the silver surface.

• A pit forms in the silver due to the impact.

• Nothing. The photons just bounce off the surface

Breakout to Discuss

• Randomized

• IF you think you got it right then explain to group.

Multiple Choice

The work function of a silver surface is 4.73 eV. Two photons of 2.5 eV each hit the silver. What happens? (Failures of Classical Mechanics – Photoelectric Effect)

• One electron is released from the silver surface, with kinetic energy of about

  0.47 eV.

• Two electrons are released from the silver surface.

• A pit forms in the silver due to the impact.

• Nothing. The photons just bounce off the surface