Principle of superposition and formation of stationary waves

Cards (7)

What is a stationary wave
a wave which transfers no energy and who’s position of maximum and minimum amplitude are constant
What is a node
A point on a stationary wave where the displacement is 0
What is an anti node
A point on a stationary wave with maximum displacement
What are the conditions for a stationary wave to be produced
waves must have the Same frequency, wavelength and amplitude
Travelling in opposite directions
These conditions are often met when a wave is reflected back on itself
How are stationary waves produced
From the superposition of 2 progressive waves, travelling in opposite directions in the same plane, with the same frequency, wavelength and amplitude
where the waves meet in phase, constructive interference occurs so antinodes (regions of max amplitude) form
where the waves meet completely out of phase, destructive interference occurs and nodes (regions of no displacement) form
describe the first harmonic for a stationary wave with two closed ends
it consists of 2 nodes at either end and an anti node in the middle
describe the second harmonic for a stationary wave with one open end and one closed end
it consists of two nodes and two anti nodes, with one of the nodes at the closed end and one of the antinodes at the open end