Quantum Physics and Photoelectric Effect Quiz

What is the work function in the context of quantum physics?

• The energy required to create a photon.

• The energy needed to form a chemical bond.

• The energy required to split an atom.

• The energy needed to release an electron from a metal surface.

Why does blue light cause electron emission from potassium, but red light does not?

• Blue light photons have more energy than the work function of potassium.

• Red light has more energy than blue light.

• Blue light has a longer wavelength than red light.

• Red light photons can interact with multiple electrons.

What determines whether an electron is emitted from a metal surface when light is shone on it?

• The wavelength and energy of the light.

• The temperature of the metal.

• The intensity of the light.

• The color of the light.

How is the de Broglie wavelength of an electron calculated?

• By multiplying Planck's constant by the electron's mass.

• By dividing the speed of light by the electron's velocity.

• By adding the electron's kinetic energy to its potential energy.

• By dividing Planck's constant by the electron's momentum.

What is the relationship between the kinetic energy of an electron and its velocity?

• Kinetic energy is inversely proportional to the velocity.

• Kinetic energy is directly proportional to the square of the velocity.

• Kinetic energy is directly proportional to the velocity.

• Kinetic energy is independent of the velocity.