By Alan Gladwell
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This theory is widely regarded to be incorrect, but, since light is assumed to be a wave, what is it a disturbance in? Features of a wave Another explanation is that light is not a wave, but instead is a stream of particles. This idea would explain away the need for an 'ether' for light to travel through. This, too, has its problems, as it does not explain why light behaves as a wave. So, we are left with a paradox. Light behaves as both a wave and a particle, but it can be shown not to be either.
Resistance is a measure of how well an artefact resists an electric current. Resistance is measured in Ohms (usually abbreviated using the Greek letter Omega, Ω) and, in formulae, is represented by the letter R. Conductance is measured in Siemens (usually abbreviated S) and, in formulae, is represented by the letter G. Resistance and conductance are each other's reciprocals, so: and Ohm's Law Ohm's Law states that the potential difference across an artefact constructed from Ohmic conductors (ie.
A wave which causes disturbance in the direction of its travel is known as a longitudinal wave, whereas a wave which causes disturbance perpendicular to the direction of its travel is known as a transverse wave. Longitudinal wave (eg. sound) Transverse wave (eg. light) Superposition One feature of waves is that they superpose. That is to say, when they are travelling in the same place in the medium at the same time, they both affect the medium independently. So, if two waves say "go up" to the same bit of medium at the same time, the medium will rise twice as much.