Photoelectric Effect
Who proved light is a wave?
Thomas Young
In a photoelectric experiment what type of graph is used to plot a kinetic energy vs. frequency.
What is a linear graph?
This effect involves a photon colliding with an electron, causing a change in the photon's wavelength.
What is Compton scattering?
A particle of light is called this.
What is a photon?
When a photon hits an electron and changes direction, this physical quantity must also change.
What is the photon’s momentum?
Light can be modeled by a wave and as discrete particles called what?
What is a Photon
The x-intercept of a kinetic energy vs. frequency graph gives this property of the material.
What is the threshold frequency
What is conserved in the collision between photons and electrons?
Energy or Momentum
This equation relates photon energy to frequency.
What is E=hfE = hfE=hf?
The photoelectric effect could not be explained by classical wave theory because it didn't follow this law when predicting energy transfer over time.
What is the law of conservation of energy?
The minimum energy required to remove an electron from a metal surface is called this.
What is the work function?
If frequency stays constant but light intensity increases, this changes in the experiment.
What is the number of photoelectrons emitted?
Compton scattering provided evidence that photons carry this property.
What is momentum?
In the photoelectric effect, photons transfer energy to these particles.
What are electrons?
In the photoelectric effect, energy is split between overcoming the work function and giving the electron this type of energy.
What is kinetic energy?
A metal plate called the emitter is connected to the negative terminal of the battery, making the emitter what charge.
A graph of stopping potential vs. frequency helps determine this physical constant.
What is Planck’s constant?
The wavelength shift in Compton scattering cannot be explained using this classical theory.
What is classical wave theory?
When photon energy is too low, this happens to the electron.
What is it remains bound
This is the name of the type of collision that happens in Compton scattering.
What is an elastic collision?
What type of collision is between objects in which the initial kinetic energy of the system is equal to the final kinetic energy of the system?
Elastic Collison
This kind of experiment provided evidence that energy of ejected electrons depends on frequency, not intensity.
What is a photoelectric experiment?
The shift in wavelength observed in Compton scattering depends on this variable.
What is the scattering angle?
This constant, represented by hhh, is used to calculate photon energy.
What is Planck’s constant?
Both Compton scattering and the photoelectric effect must obey this combination of conservation laws.
What are conservation of energy and conservation of momentum?