Photoelectric Effect Quiz

A beam of light is directed onto a sheet of metal, but the electrons are not ejected from the metal. Increasing which of the following could possibly cause the metal to begin to eject electrons?

• Frequency

• Wavelength

• Intensity

• Speed

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As a photon strikes a piece of metal, the kinetic energy of an ejected electron is determined by -

• the frequency of the absorbed photon.

• the number of absorbed photons.

• the path taken by the escaped electron.

• the mass of the escaped electron.

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In some situations when a beam of light is directed at a metal surface, an electron is emitted. This happens because the photons in the light -

• combine with metal atoms to create electrons, which scape.

• are transformed into electrons with enough energy to escape.

• transfer their energy to an electron, helping the electron escape.

• are destroyed on impact, generating electrons which scape.

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When light is described as having a dual nature, this means that light can -

• act in both the positive and negative directions.

• travel through space and through matter.

• behave as a particle and as a wave.

• transmit both energy and matter.

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Photoelectrons are emitted from a metal surface when light shines on it. If the wavelength of the light is decreased, the -

• number of electrons emitted will decrease.

• kinetic energy of the emitted electrons will decrease

• number of electrons emitted will increase

• kinetic energy of the emitted electrons will increase.

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When light is directed onto a metal surface, electrons are not emitted. Which of the following could potentially induce electron emission from the metal?

• Increasing the amplitude of the light waves.

• Reducing the angle of incidence of the light.

• Introducing a magnetic field around the metal.

• Elevating the temperature of the metal surface.

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When photons interact with a metal surface, the energy of the ejected electrons depends on -

• the angle of incidence of the photons.

• the polarization state of the incident light.

• the speed of the electrons within the metal.

• the energy of the absorbed photons.

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In the process where light liberates electrons from a metal surface, the emitted electrons acquire kinetic energy due to -

• the collision with other electrons in the metal.

• the transfer of momentum from the incident photons.

• the activation of electron-positron pairs within the metal.

• the excitation of atomic nuclei in the metal lattice.

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When light of varying frequencies is directed onto a metal surface, electrons are observed to be emitted. Which of the following best explains this phenomenon?

• Electrons absorb the photons and are ejected due to increased thermal energy.

• The photons collide with the metal atoms, causing them to release electrons.

• Photons transfer their energy to electrons in the metal, allowing them to overcome the binding energy and escape.

• The light induces a chemical reaction on the metal surface, resulting in electron

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