AQA A-Level Physics Correct Questions and Answers 2023

AQA A-Level Physics Correct Questions and Answers 2023 Rest Mass of Proton in eV and MeV 938 x 10^-6 eV and 938MeV Rest Mass of Electron in eV and MeV 0.51 x 10^-6 and 0.51MeV Definition of Isotope Same Proton Number and Different Nucleon Number Mass of Proton/Neutron and Electron 1.67x10^-27 and 9.11x10^-31 Specific Charge Equation Charge of Proton x Amount of Protons/Mass of Amount of Nucleons - Charge/Mass Definition of Strong Nuclear Force Attractive Force - Holds Protons and Neutrons Together in Nucleus What Range Does The Strong Nuclear Force Effect 0.5 up to 3-4 Femtometres (fm) Effect of Strong Nuclear Force Less Than 0.5fm Repulsive to Prevent Protons and Neutrons Being Pushed Into Each Other What Force Has a Limited Range (Distance) Strong Nuclear Force Nucleon and Proton Number of Alpha Radiation 4 Nucleons, 2 Proton Number Nucleon and Proton Number of Beta Radiation 0 Nucleons, -1 Proton Number Definition of Electromagnetic Wave A Burst of a Packet of Photons Equation for Photon Energy E = hf Equation for Power of a Beam Power of Beam = nhf What is Annihilation? Two Particles Collide to Form 2 Photons What is Pair Production? Photon Creates a Particle and Anti-Particle Annihilation Equation for Minimum Energy of Photon hf_min = Eo Pair Production Equation for Minimum Energy of Photon hf_min = 2Eo Feynman Diagram for Neutron-Neutrino Interaction Feynman Diagram for Proton-Antineutrino Interaction Feynman Diagram for B- Decay Feynman Diagram for B+ Decay Feynman Diagram for Electron Capture What Force Do Hadrons Interact With? Strong Interaction What Force Do Leptons Interact With? Weak Interaction State The Charge of Up, Down and Strange Quarks 2/3, -1/3, -1/3 State The Charge of Anti Up, Down and Strange Quarks -2/3, 1/3, 1/3 Quark Composition of Proton uud Quark Composition of Neutron udd Quark Composition of K+ and K- u_s, s_u Quark Composition of Pie+ and Pie- u_d, d_u Conservation Laws - What is Conserved? Conserved: Charge, Momentum, Baryon Number, Energy and Lepton Number Conservation Laws for Strangeness? Only Conserved in Strong Interactions Definition of Threshold Frequency Minimum Frequency of Light That Can Cause The Photoelectric Effect to Take Place What is The Correlation Between Number of Electrons Emitted and Intensity of Radiation These Are Proportional Equation for Energy of a Photon (2 Equations) E = hf or hc/ , Definition of Work Function The Minimum Energy Need by an Electron to Leave a Metal Surface Equation for Maximum Kinetic Energy of an Electron Ek_max = hf - o (work function) Equation for Threshold Frequency F = o/h Definition for Excitation Atom Absorbs Energy Because of an Electron Moving From an Inner to an Outer Shell Definition for Ionisation Where an Atom Takes in or Release Electrons to Form Positive/Negative Ions Equation for Energy of An Emitted Photon E = hf = E1 - E2 Process of Fluorescense (Fluorescent Tube) - Ionisation and Excitation of Mercury Atoms Occur as They Collide With Electrons Which Have Been Accelerated - The Mercury Atoms Emit UV Photons and Photons of Much Less Energy - The UV Photons are Absorbed by Atoms in the Fluorescent Coating Causing Excitation of the Atoms - These Atoms De-Excite in Steps and Emit Visible Light Photons Definition of Wave-Particule Duality With Example Matter Particles Have Wave-Like Natures and Particle-Like Natures, E.g Photons Equation for De-Broglies Wavelength (2 Equations) , = h/p or h/mv