path difference Flashcards
1
Q
what is path length
A
the distance a wave travels from its source to a given point.
2
Q
what is path distance
A
the difference in distance that two waves travel from their sources to a given point
3
Q
what condition can u measure path difference in wavelengths
A
if both waves have the same wavelength
4
Q
what rules are there in order to use path difference
A
start at the same point in their wave cycles.
5
Q
what does a path difference of full wavelengths give
A
constructive interference
6
Q
what does a path difference of one and a half wavelengths give
A
destructive interference
7
Q
what is the expression for destructive interference
A
(n+1/2)y
8
Q
what is the expression for constructive interference
A
ny
