waves Flashcards
what do you need to create a sound
You need a vibrating force
What is a wave
a wave is a vibration (of something) that transfers energy from one place to another with no transfer
what is amplitude
Amplitude is the maximum value of the displacement
What is a point of no displacement
a node
The opposite of this (a point of max displacement) is called an antinode
The principle of superposition
when two or more waves cross at a point, the displacement at that point is equal to the sum of the displacements of the individual waves
How is a stationary wave produced
a stationary wave is the result of interference between two travelling waves of equal frequency and amplitude, travelling along the same line with the same speed but in opposite directions
Resonance
In physics, resonance occurs when a forcing frequency equal to (or multiples of) the natural frequency of a system causes the system to vibrate with maximum amplitude. These are known as the system’s resonant frequencies. A resonator may have a fundamental frequency and any number of harmonics.
What is a node
a point of no displacement
What is an antinode
the opposite of a node (a point of high displacement)
What is the inter nodal distance
The distance between two nodes
wavelength of red light
700nm (nanometers)
wavelength of violet light
400nm (nanometers)
what are coherent sources
Constant phase difference
Coherent meaning
constant phase difference
What is monochromatic light
one single frequency wavelength
