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Physics Online
Physics Online - A level
A selection of videos aimed at post 16 physics students.
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Showing 29 result(s)
Wave terminology -wavelength, period, amplitude and phase difference
This video uses a jelly baby wave machine to introduce the motional properties of progressive and standing waves and to introduce key terminology.
A displacement – distance graph is used to define wavelength (λ) and the phase of a wave. A complete wave cycle is 360⁰ and from this the position of a particle...
Waves - coherence and path difference
This video introduces explains the difference between the phase difference of a wave (measured in degrees) and the path difference of a wave (measured in metres of fraction of a wavelength).
When waves are coherent and have a path difference that is a multiple of λ, then the interference is constructive. ...
Waves - diffraction gratings
This video begins by asking the question, “why do we see rainbow colours on the surface of a DVD?”.
Light from a laser is shone through a diffraction grating to demonstrate a diffraction pattern. The terms 0th, 1st and 2nd order maxima are introduced and explained using the...
Waves - optical fibres
This video recaps on the idea that light sent along an optical fibre requires total internal reflection for it to progress along its length. It explains that information is sent as a series of on – off signals. However, if light rays take different paths they can be modally dispersed, and this can degrade the...
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| Subject(s) | Science, Physics |
|---|---|
| Age | 16-19 |
| Published | 2010 to 2019 |
| Published by | |
| Direct URL | https://www-preprod.stem.org.uk/cxexyo |
