Superposition Flashcards
1
Q
What is polarisation?
A
Confinement of oscillations in a wave to one direction in a plane perpendicular to the direction of transfer of energy.
2
Q
State the principle of superposition.
A
When two or more waves of same kind meet at a point at the same time, the resultant displacement of the wave is the vector sum of displacements due to each wave.
3
Q
What is diffraction?
A
It is bending or spreading of waves when they pass through an obstacle or an aperature.
4
Q
What is meant by coherence?
A
Having constant phase difference.
5
Q
How is observable fringes achieved?
A
- Coherent waves with constant phase difference
- Waves must meet
- Waves have approximately equal amplitudes
- Waves must be either unpolarised or polarised in the same plane
6
Q
What is interference?
A
Occur when two or more coherent waves meet and superpose to produce a new resultant wave.
