4.4 superposition

Question 1

superposition

Answer 1

when two or more waves of the same type meet exist at the same place,

the resultant wave will be found by adding the displacements of each individual wave

Question 2

interference

Answer 2

the formation of points of cancellation and reinforcement, where 2 coherent waves pass through each other

Question 3

coherence

Answer 3

2 waves with a constant phase relationship

Question 4

path difference

Answer 4

the proportion of a wavelength by which 2 waves are out of synch

Question 5

constructive interference

Answer 5

when 2 waves reinforce to give increased amplitude

occurs when the path difference is a whole number of wavelengths λ,2λ,etc

occurs when the phase difference is a multiple of 2π, 4π,etc

Question 6

destructive interference

Answer 6

when 2 wave cancel to give reduced amplitude

occurs when the path difference is a whole number of wavelengths λ,2λ,etc

occurs when the phase difference is a multiple of 2π, 4π,etc