HW-1 grade 12

The photoelectric effect refers to:

c

• The emission of light by certain material

• The emission of electrons by certain materials when exposed to light

• The reflection of light by certain materials

Which scientist is credited with the discovery of the photoelectric effect?

• Isaac Newton

• Max Planck

• Thomas Edison

• Albert Einstein

According to the photoelectric effect, increasing the intensity of the incident light will:

• a) Increase the energy of the emitted electrons

• b) Decrease the energy of the emitted electrons

• c) Increase the number of emitted electrons

• d) Have no effect on the photoelectric effect

The photoelectric effect provides evidence for the particle-like nature of light, which is explained by:

• a) Wave-particle duality(as wave and as particles)

• b) Newton's laws of motion

• c) Ohm's law

• d) Faraday's law of electromagnetic induction

The minimum frequency of light required to cause the photoelectric effect is called:

• a) Threshold frequency

• b) Resonance frequency

• c) Critical frequency

• d) Cutoff frequency

If the frequency of the incident light is below the threshold frequency, the photoelectric effect:

• a) Will not occur

• b) Will occur with reduced intensity

• c) Will occur with increased intensity

• d) Will occur with the same intensity as for higher frequencies

The kinetic energy of the emitted electrons in the photoelectric effect depends on:

• a) The intensity of the incident light

• b) The wavelength of the incident light

• c) The amplitude of the incident light

• d) The frequency of the incident light

The particle that the light wave made of are called

• phonons

• photos

• photons

• electrons

The ejected electrons through the photoelectric effect are called

• positrons

• neutrons

• photoelectrons

• photons

The photoelectric effect can be determined by

• The type of the metal in the cathode

• The frequency of the incident light

• The intensity of the light

• All answers are correct