general terminology
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11 Terms
principle of superposition
when two or more waves meet at a point, resultant displacement is the sum of the displacement of the individual waves
diffraction
spreading of waves when pass through a gap or around an edge creating a geometric shadow
interference
superposition of two or more waves from coherent sources
constructive interference
2 waves come together to produce an increased amplitude at a point in space
destructive interference
2 waves cancel out to give reduced or zero amplitude at a point in space
coherent sources
2 sources with exactly the same frequency and 0 or constant phase difference
path difference
extra distance travelled by one of the waves when compared to the other
interference diagram
constructive interference path difference
n*wavelength
destructive interference path difference
n+0.5 * wavelength
interference maxima
regions where light wave from 2 slits arrive in phase with each other…coherent
Note 
Flashcards (20)