Unit 14 Review: Atomic, Nuclear, and Quantum Physics

What are the two primary models of light?

• Particle and Wave

• Particle and Photon

• Photon and Nuclear

• Photon and Wave

True or False: The particle theory of light helped explain the photoelectric effect.

• True

• False

What is a photon?

• the smallest quantity of anything

• the smallest quantity of light

• a bundle of energy

• a combination of protons and neutrons

What is the relationship between the frequency and energy of a photon?

• they are directly related

• they are inversely related

• they are not related in any way

• frequency is the amount of energy²

What is the relationship between the wavelength and energy of a photon?

• they are directly related

• they are inversely related

• energy is the wavelength²

• they are not related at all

In the photoelectric effect, a light is placed on a metal sheet and electrons are emitted. However, this doesn’t work for every light. Why are electrons not ejected when a red light strikes a metal sheet?

• The mass of a photon is not enough to eject electrons.

• The energy of a photon is not enough to eject electrons.

• The red light probably needs a greater intensity.

If no photons are emitted, is energy present?

• yes

• yes, but so few that it makes no significant difference

• no

• there is not enough information to answer this question

Students shine a blue light to a metal plate. The light shined on the plate caused electrons to be ejected from the plate. If the students wanted to increase the energy of the ejected electrons on the same metal plate, what two changes can they make?

• increase frequency and change the light source

• increase frequency and increase wavelength

• decrease frequency and increase intensity of light

• increase wavelength and decrease energy

Students perform a photoelectric emission lab. They shine a GREEN colored light at a metal sheet and observe if the sheet produces photoelectrons to turn a light on. Which color of light shown on a metal would emit photoelectrons? Select all that apply.

• orange

• yellow

• ultraviolet

• blue

• violet

What type of spectrum is shown?

• emission

• absorption

• visible

• photon

Tags

NGSS.HS-ESS1-2

NGSS.HS-PS4-1

NGSS.HS-PS4-3