Statistics for AQA - A Level Physics - Particles and radiation #6

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Hint	Answer	% Correct
Which processes can lead to the excitation of an atom	A collision with a charged particle ,The absorption of a photon by an electron in the atom.	0%
What happens in terms of quarks during beta minus decay	A down quark (in a neutron) turns into an up quark (in a proton)	0%
Describe the de-excitation of an atom	An electron moves down energy levels and emits a photon	0%
What happens in terms of quarks during beta plus decay	An up quark (in a proton) turns into an down quark (in a neutron)	0%
How do you calculate the threshold frequency from the work function?	Divide the work function by Planck's constant	0%
What happens to the photon energy if frequency is doubled?	Doubled	0%
Which key piece of evidence that demonstrated the validity of De Broglie's matter-wave hypothesis?	Electron diffraction through a thin metal foil	0%
What happens to the number of photoelectrons per second if the intensity of light remains the same but frequency is doubled?	Halved	0%
What two variables determine the De Broglie wavelength of a particle?	Mass and velocity	0%
What happens to the photoelectrons produced if the intensity of a light source is increased but the frequency is constant?	More photoelectrons will be produced but they will have the same maximum kinetic energy	0%
When is strangeness conserved?	Strong interaction	0%
Define ionisation	The addition or removal of an electron from a neutral atom.	0%
Define excitation of an atom	The atom gains energy and an electron moves up to a higher energy level.	0%
Define ionisation energy	The energy required to remove an electron that is in the ground state of an atom.	0%
Two factors that determine the maximum kinetic energy of photoelectrons are…?	The frequency of the light and the work function of the metal	0%
A photon can ionise an atom if its energy is greater than …?	the ionisation energy	0%
Define the ground state of an atom	The lowest energy level an electron can occupy	0%
Define work function of a metal	The minimum energy required to remove an electron from the surface of the metal	0%
Define threshold frequency	The minimum frequency of light required to produce photoelectrons	0%
A photon can produce a photoelectron if its frequency is greater than	the threshold frequency	0%
Why does the kinetic energy of photoelectrons from monochromatic light vary in the photoelectric effect?	The work function is a minimum energy. Some electrons require more energy to be liberated.	0%
The energy of a photon is inversely proportional to…?	Wavelength	0%