AQA A-level PHYSICS Paper 3 Section B Astrophysics JUNE
2025 QUESTION PAPER
Specific Charge - 100% correct answer as The charge per unit mass of a particle.
Proton Number (Z) - 100% correct answer as The number of protons in an
atom of a certain element
Nucleon Number (A) - 100% correct answer as The number of
nucleons (protons and neutrons) in an atom of a certain element
Threshold Frequency (f= Φ/h) - 100% correct answer as The minimum
frequency of light required to cause the emission of photoelectrons when
shone onto a metal's surface
Modal Dispersion - 100% correct answer as The broadening of a pulse due
to reflected light taking paths of different lengths through the fibre
Pulse Broadening - 100% correct answer as When signal in an optical fibre gets
wider as it is transmitted due to dispersion
,Work Function (Φ) - 100% correct answer as The minimum amount of energy
required for an electron to escape a metal's surface
Stopping Potential (V=Ekmax/e) - 100% correct answer as The potential
difference needed to stop the fastest moving electrons emitted from the
surface of a metal
Destructive Interference - 100% correct answer as When waves with
displacements that are in the opposite direction meet and have their displacements
cancel out
Total Destructive Interference - 100% correct answer as Destructive
interference in which the waves completely cancel each other out
Overtone - 100% correct answer as A natural frequency that is a multiple of
the fundamental tone's frequency
Resonant Frequency - 100% correct answer as A frequency at which a
stationary wave is formed due to an exact number of waves being produced in the time
it takes for the wave to get to the end of the medium and back
First Harmonic - 100% correct answer as The lowest frequency at which a
stationary wave is formed where the wavelength is double the length of the vibrating
medium
, Intensity - 100% correct answer as Power per unit area
Maxima - 100% correct answer as Bright fringes formed from
constructive interference with a path difference of λ
Minima - 100% correct answer as Dark fringes formed from total
destructive interference with a path difference of λ/2
Diffraction Grating - 100% correct answer as A grating consisting of lots of
equally spaced slits very close together
Zero Order Line - 100% correct answer as The line of maximum
brightness at the centre of the interference pattern
Line Absorption Spectra - 100% correct answer as A light spectrum with
dark lines corresponding to different wavelengths of light that have been absorbed
Optical Density - 100% correct answer as The property of a medium that
describes how fast light travels through it
Total Internal Reflection - 100% correct answer as When all light is completely
reflected back into a medium at a boundary with another medium (occurs when the
angle of incidence > critical angle)
2025 QUESTION PAPER
Specific Charge - 100% correct answer as The charge per unit mass of a particle.
Proton Number (Z) - 100% correct answer as The number of protons in an
atom of a certain element
Nucleon Number (A) - 100% correct answer as The number of
nucleons (protons and neutrons) in an atom of a certain element
Threshold Frequency (f= Φ/h) - 100% correct answer as The minimum
frequency of light required to cause the emission of photoelectrons when
shone onto a metal's surface
Modal Dispersion - 100% correct answer as The broadening of a pulse due
to reflected light taking paths of different lengths through the fibre
Pulse Broadening - 100% correct answer as When signal in an optical fibre gets
wider as it is transmitted due to dispersion
,Work Function (Φ) - 100% correct answer as The minimum amount of energy
required for an electron to escape a metal's surface
Stopping Potential (V=Ekmax/e) - 100% correct answer as The potential
difference needed to stop the fastest moving electrons emitted from the
surface of a metal
Destructive Interference - 100% correct answer as When waves with
displacements that are in the opposite direction meet and have their displacements
cancel out
Total Destructive Interference - 100% correct answer as Destructive
interference in which the waves completely cancel each other out
Overtone - 100% correct answer as A natural frequency that is a multiple of
the fundamental tone's frequency
Resonant Frequency - 100% correct answer as A frequency at which a
stationary wave is formed due to an exact number of waves being produced in the time
it takes for the wave to get to the end of the medium and back
First Harmonic - 100% correct answer as The lowest frequency at which a
stationary wave is formed where the wavelength is double the length of the vibrating
medium
, Intensity - 100% correct answer as Power per unit area
Maxima - 100% correct answer as Bright fringes formed from
constructive interference with a path difference of λ
Minima - 100% correct answer as Dark fringes formed from total
destructive interference with a path difference of λ/2
Diffraction Grating - 100% correct answer as A grating consisting of lots of
equally spaced slits very close together
Zero Order Line - 100% correct answer as The line of maximum
brightness at the centre of the interference pattern
Line Absorption Spectra - 100% correct answer as A light spectrum with
dark lines corresponding to different wavelengths of light that have been absorbed
Optical Density - 100% correct answer as The property of a medium that
describes how fast light travels through it
Total Internal Reflection - 100% correct answer as When all light is completely
reflected back into a medium at a boundary with another medium (occurs when the
angle of incidence > critical angle)
