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Flashcards in Superposition Of Waves Deck (9):
1

How are stationary waves formed ?

Stationary waves are formed by the superposition of two identical waves travelling in opposite direction.

2

What do you mean by 'identical wave' ?

By identical wave we mean that the waves must have the same value of v, ω and k.

3

What are antinodes?

Antinodes are points where amplitude of waves is maximum. ( or A1+ A2 ). Antinodes are also called points of constructive interference.

4

Why are nodes ?

Nodes are point where amplitude is minimum ( or A1-A2). Nodes are also called points of destructive interference.

5

What happens when amplitudes A1 and A2 are same or equal? ( to say A) ?

Then the amplitude at antinodes is 2A and at nose is zero. In this case points at node do not oscillate.

6

Which points ( Node or antinodes ) have minimum and maximum energy of oscillation ?

Points at antinodes have maximum energy of oscillations and points at nodes have minimum( Zero when A1=A2)

7

When are points in wave motion said to be in the same phase and when are they said to be out of phase ?

Points lying between two successive nodes are in same phase and points lying between two neighbouring successive nodes are said to be out of phase.

8

Why is the general eq of a stationary wave ?

y= 2A sin kx cos ωt.

9

What is the formula of frequency of a oscillations of a stretched wire or organ wire ?

f= n(v/2l). Using this even and odd both harmonica are obtained.
v= √T/μ=√T/pS