A-Level Physics

Introduction When waves pass through a narrow gap, they spread out.

Introduction If two or more waves collide, they are said to interfere.

Introduction An electron is a subatomic particle with finite mass and negative electric charge.

Introduction Light waves can behave like particles (photons) and waves.

Introduction When white light from a tungsten filament is passed through a prism, the light is dispersed into its component colours, as illustrated in Figure 1.

Introduction Protons, neutrons and electrons that move around the nucleus constitute an atom, as illustrated in Figure 1.

Introduction The atoms of all elements are made up of three particles called protons, neutrons and electrons.

Introduction In the classification of subatomic particles, as illustrated in Figure 1, Hadrons (Mesons and Baryons) are made up of three smaller particles called quarks.

Introduction An atom contains an equal number of positively charged protons and negatively charged electrons and their charges balance.

Introduction Every particle has an antiparticle, according to the standard model for describing fundamental particles and interactions.