superposition

Question 1

Principle of Supersposition

superposition

Answer 1

when 2 or more waves meet at a point, the resultant displacement at that point is the vector sum of the displacements of the individual waves at that point

Question 2

Interference definition

superposition

Answer 2

an effect that occurs when 2 or morewaves overlap & it follows the principle of superposition

Question 3

Phase Difference definition

superposition

Answer 3

measure of the fraction of a cycle that one wave is moving out of step with the other wave

Question 4

Coherence definition

superposition

Answer 4

constant phase difference between the waves (or sources of waves) with time

Question 5

Conditions for Obsrvable Interference

superposition

Answer 5

• the sources or waves are coherent
• waves from sources have similar amplitudes
• waves from the sources must overlap
• waves are of the same type
• for polarised transverse waves, waves must have the same plane of polarisation

Question 6

Diffraction definition

superposition

Answer 6

spreading of waves after passing through a slit or around an edge of an obstacle

Question 7

Limit of Resolution / Resolving Power of an Aperture

superposition

Answer 7

occurs when the central maximum of the 2nd source coincides with the first minimum of the frst source

Question 8

Types of Interference

superposition

Answer 8

• constructive
• destructive

Question 9

Constructive waves definition

superposition

Answer 9

waves that are in-phase and superpose to produce maximum amplitude and intensity

Question 10

Destructive waves definition

superposition

Answer 10

waves that are in anti-phase and superpose to produce minimum amplitude and intensity

Question 11

Natural Frequencies

Answer 11

string
- 2 nodes at the end

tube
- node at closed end & antinode at open end
- 2 antinodes at open ends