Superposition of waves Flashcards
1
Q
principle of superposition?
A
When two or more waves meet at a point the resultant displacement is the algebraic sum of the displacements of the individual waves.
2
Q
diffraction?
A
spreading of waves as it passes through a gap
3
Q
constructive interference?conditions?
A
when two waves arrive in phase with each other
path difference is whole number of wavelengths
4
Q
destructive interference?conditions?
A
when two wave arrive completely out f phase with each other, they cancel out each other.
odd number of half wavelenghts
5
Q
path difference?
A
extra distance travelled by one of the waves compared with the other.
6
Q
coherent waves?
A
waves which have a constant phase difference
7
Q
monochromatic?
A
very small or no range of wavelengths or frequencies.
