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...
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...
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) ...
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...
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...
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...
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