Edexcel A Level Physics:复习笔记5.14 Critical Angle
Critical Angle As the angle of incidence is increased, the angle of refraction also increases until it gets to 90° When the angle of refraction is exactly 90° the light is refracted along the bound...
Edexcel A Level Physics:复习笔记5.13 Refraction & Refractive Index
Refraction & Refractive Index Refraction occurs when light passes a boundary between two different transparent media At the boundary, the rays of light undergo a change in direction and a chang...
Edexcel A Level Physics:复习笔记5.12 Equation for the Intensity of Radiation
Equation for the Intensity of Radiation Progressive waves transfer energy The amount of energy passing through a unit area per unit time is the intensity of the wave Therefore, the intensity is def...
Edexcel A Level Physics:复习笔记5.11 Core Practical 7: Investigating Stationary Waves
Core Practical 7: Investigating Stationary Waves Aims of the Experiment The overall aim of the experiment is to measure how the frequency of the first harmonic is affected by changing one of the fo...
Edexcel A Level Physics:复习笔记5.10 Wave Speed on a Stretched String
Wave Speed on a Stretched String The speed of a wave travelling along a string with two fixed ends is given by: Where: T = tension in the string (N) μ = mass per unit length of the string (kg m–1) ...
Edexcel A Level Physics:复习笔记5.9 Stationary Waves
Stationary Waves Stationary waves, or standing waves, are produced by the superposition of two waves of the same frequency and amplitude travelling in opposite directions This is usually achieved b...
Edexcel A Level Physics:复习笔记5.8 Phase & Path Difference
Phase & Path Difference Waves are said to be coherent if they have: The same frequency A constant phase difference Phase Difference Two points on a wave, or on different waves, are in ph...
Edexcel A Level Physics:复习笔记5.7 Interference & Superposition of Waves
Interference & Superposition of Waves Interference occurs whenever two or more waves combine to produce a resultant wave with a new amplitude Superposition literally means to be positioned over...
Edexcel A Level Physics:复习笔记5.6 Core Practical 6: Investigating the Speed of Sound
Core Practical 6: Investigating the Speed of Sound Aim of the Experiment To measure the speed of sound in air using an oscilloscope and a signal generator Variables Independent variable = Distance ...
