Waves Flashcards
(10 cards)
When do compressions and rarefactions occur in a displacement-distance graph
Compression occurs when gradient is negative
Rarefactions occurs when gradient is positive
Why can longitudinal waves not be polarized
Oscillations are in same direction of waves propagation
What is an optical fibre
What is cladding in an optical fibre used for
Advantages and disadvantages of optical fibre vs cable
How to overcome problems of optical fibres
What is superposition
When two waves that have :
* Are the same type
* Pass through same medium
* Pass through at same time
The displacements of the wave add together at every point
Phase difference of the two waves is zero
How are stationary waves formed
When two waves with
* Same frequency
* Similar amplitude
* Constant phase difference
* Travel in opposite directions through same medium and overlap
They superpose and produce a resultant wave
