Y1 Ch 06 Definitions Flashcards
1
Q
Superposition
A
When two waves of the same type overlap and interact. The displacement of the medium, where the waves overlap, is the vector sum of the two wave’s displacement.
2
Q
Interference
A
The superposition of 2 coherent waves.
3
Q
Coherent waves
A
Fixed phase difference and the same frequency
4
Q
Stationary wave
A
A wave formed by the superposition of two progressive waves of the same frequency and amplitude travelling in opposite directions.
5
Q
Node
A
A point with 0 amplitude on a stationary wave
6
Q
Antinode
A
A point with maximum amplitude on a stationary wave
7
Q
Harmonic
A
a mode of vibration that is a multiple of the first harmonic.
8
Q
Diffraction
A
When waves pass through a gap or move past an obstacle, they spread.
9
Q
Diffraction grating
A
Thousands of slits spaced closely together.
