Photoelectric effect

State what the threshold frequency means, with reference to the photoelectric effect.

Feb/March 2016

State the meaning of the term photon.

Feb/March 2019

By reference to the photoelectric effect, explain what is meant by work function energy.

Feb/March 2020

A photon carries an energy of $3.11 \times 10^{-19}\,\text{J}$. Calculate the momentum of the photon.

Feb/March 2024

Experiments are carried out to study the photoelectric effect.

May/June 2011

The photoelectric effect can be written using the equation photon energy $=$ work function energy $+$ maximum kinetic energy of electron.

May/June 2012

Fig. 7.1 presents some values of the work function energy $\phi$ and the threshold frequency $f_0$ for a number of metal surfaces.

May/June 2013

Fig. 7.1 shows data for the work function energy $\phi$ and the threshold frequency $f_0$ for several metal surfaces.

May/June 2013

On a given metal surface, it is noticed that there is a lowest frequency of light below which photoelectric emission does not happen. This result is evidence that electromagnetic radiation has a particulate nature.

May/June 2014

For one metal surface, it is found that photoelectric emission only occurs when the light has a frequency above a certain minimum value. This result shows that electromagnetic radiation has a particle-like nature.

May/June 2014

Give two brief phenomena linked to the photoelectric effect that wave theory of light cannot account for.

May/June 2017

Explain what the term photon means.

May/June 2018

Describe what is meant by the photoelectric effect.

May/June 2018

Explain what is meant by the term photon.

May/June 2018

State three separate pieces of evidence from the photoelectric effect that show electromagnetic radiation has a particulate nature.

May/June 2019

A section of a circuit containing an operational amplifier (op-amp) is shown in Fig. 9.1.

May/June 2019

State three items of evidence from the photoelectric effect that support a particulate nature for electromagnetic radiation.

May/June 2019

Electromagnetic radiation with one fixed frequency is incident on a metal surface, causing an electron to be emitted. Explain why the maximum kinetic energy of the electron does not depend on the intensity of the incident radiation.

May/June 2021

A metal sphere that is isolated and has radius $r$ is given charge so that the electric potential at its surface is $V_0$. On Fig. 5.1, sketch how electric potential varies with distance $x$ from the sphere's centre. Your graph must cover $x = 0$ to $x = 3r$.

May/June 2021

Electromagnetic radiation with one constant frequency is incident on a metal surface. An electron is emitted. Explain why the maximum kinetic energy of the electron does not depend on the intensity of the incident radiation.

May/June 2021

State the meaning of a photon.

May/June 2022

State what the term photon means.

May/June 2022

State the meaning of the photoelectric effect.

May/June 2025

Using the photoelectric effect, state the meaning of the threshold frequency.

Oct/Nov 2010

An account of the photoelectric effect should use the terms photon energy and work function energy.

Oct/Nov 2011

State what the term photon means.

Oct/Nov 2012

State the meaning of a photon.

Oct/Nov 2012

Using the photoelectric effect as context, explain what is meant by work function energy.

Oct/Nov 2013

By using the photoelectric effect, state what the term threshold frequency means.

Oct/Nov 2015

By referring to the photoelectric effect, state what threshold frequency means.

Oct/Nov 2015

A beam of light with wavelength $\lambda$ falls on a metal surface whose work function energy is $\Phi$. The surface emits photoelectrons with maximum kinetic energy $E_{\text{MAX}}$.

Oct/Nov 2015

Explain what is meant by the photoelectric effect in this context.

Oct/Nov 2016

Explain what is meant by the term photoelectric effect.

Oct/Nov 2016

A metal surface is exposed to light of one wavelength $\lambda$. On Fig. 10.1, sketch how the maximum kinetic energy $E_{\text{MAX}}$ of the electrons emitted from the surface varies with $\lambda$. On your sketch, label the threshold wavelength with the symbol $\lambda_0$.

Oct/Nov 2017

State what a photon is.

Oct/Nov 2018

In the photoelectric effect, state what is meant by work function energy.

Oct/Nov 2019

In the photoelectric effect, what does the term work function energy mean?

Oct/Nov 2019

When electromagnetic radiation falls onto a metal surface, it is found that no electrons are emitted below a certain minimum frequency. This result supports the view that electromagnetic radiation has a particulate nature.

Oct/Nov 2020

State what the photoelectric effect means.

Oct/Nov 2021

State what the term work function energy of a metal means.

Oct/Nov 2022

State what is meant by the work function energy of a metal.

Oct/Nov 2022

State what the term photon means.

Oct/Nov 2023

A smooth magnesium sheet in a vacuum releases electrons when ultraviolet radiation falls on it.

Oct/Nov 2024

A smooth sheet of magnesium in a vacuum gives off electrons when ultraviolet radiation is shone on it.

Oct/Nov 2024

State what the photoelectric effect means.

Oct/Nov 2025