Superposition and coherence 0.0 / 5 ? PhysicsWavesASOCR Created by: apple87Created on: 25-05-15 11:34 When does superposition happen? When two or more waves pass through eachother. 1 of 16 What happens at the instant the waves cross? The displacements of each wave combine. 2 of 16 What type of interference do you get when a trough meets a trough or a crest meets a crest? Constructive interference. 3 of 16 What does a trough plus a crest of equal size give, and which type of interference is this? Nothing- the waves cancel eachother out. Destructive interference 4 of 16 Which way do phasors rotate? Anti-clockwise. 5 of 16 What does the length of the phasor arrow show? Amplitude 6 of 16 How do you find the resultant amplitude using phasors? Add the phasors tip to tail. 7 of 16 When are two waves in phase? If they are both at the same point in the wave cycle. 8 of 16 What is it called when waves are exacly out of phase? Antiphase 9 of 16 Waves that are in phase have a phase difference of what? 0 or multiple of 360 10 of 16 Waves that are exacly out of phase have a phase difference of what? 180 11 of 16 To get interference patterns two sources must be what? Coherent 12 of 16 When are two sources coherent? When they have the same wavelength and frequency and a fixed phase difference between them. 13 of 16 What does constructive and destructive interference depend on? Path difference 14 of 16 What is the formula for constructive interference? Path difference= n x wavelength (Where n is an integer) 15 of 16 What is the formula for destructive interference? Path difference= (2n+1) x wavelength / 2 = (n+1/2)wavelength 16 of 16

## Comments

No comments have yet been made