AQA AS 2022 Paper 1 - AS-level Physics Past Paper

11/26/24 •

Summaries by topic

• English

This podcast summarizes the AQA AS-level Physics 2022 Paper 1, covering topics including particle physics, isotopes, interference, refraction, the photoelectric effect, electron diffraction, and mechanics and materials. The podcast provides detailed explanations and solutions for each question, aiming to help students understand the concepts and improve their exam preparation, including specific points on interpreting data and applying relevant equations.

Particle Physics

• 00:00:13 The podcast starts with a table of particle properties and their conservation in strong interactions. It determines properties like baryon number, charge, and strangeness for particles like pions, protons, and sigma particles. The podcast emphasizes the importance of conserving quantities like baryon number and strangeness.

Isotopes

• 00:01:30 Bromine gas exists as Br2 molecules, and the podcast explains the relationship between the number of nucleons and the possible isotopes of bromine. The speaker calculates the number of neutrons for the isotope with the greater nucleon number, considering the different combinations of isotopes in the Br2 molecule.

Interference and Refraction

• 00:06:22 The podcast covers interference and refraction problems, using a scenario of a satellite emitting pulses that reflect off the ocean's surface. It involves calculating the number of cycles in a pulse, using the concept of path difference to calculate the height of the satellite, and employing Snell's Law to deduce the refractive index of ice.

Photoelectric Effect

• 00:12:42 The podcast explains the photoelectric effect, highlighting the relationship between the energy of photons, frequency, threshold frequency, and work function. The speaker describes how the rate of loss of charge increases with intensity but the energy given to each electron remains constant, emphasizing the one-to-one interaction between photons and electrons.

Electron Diffraction

• 00:16:03 The podcast discusses electron diffraction, explaining that electrons exhibit wave-like behavior at specific points in an apparatus. It explains that interference produces maxima and minima due to electrons arriving at antiphase, and analyzes the change in diffraction pattern when electron speed increases, clarifying the relationship between wavelength and speed.