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10 Cards in this Set

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Coherent waves
Waves are in phase and have the same frequency.
Phase? V=f(lambda)?
Phase Difference
The separation between two points on the same wave. Can be measured in radians or a fraction of a wavelength
Remember sine graph. Origin to any point of x (pi radians) = to the wavelength
Division of Amplitude
A wave is split into its transmitted and reflected counterparts. The reflected waves usually interfere.
Remember air wedge experiment or thin film experiment.
Division of Wavefronts
When two coherent waves are produced from the same point or line source. When they diffract, they interfere with each other producing an interference pattern.
Young's double slit experiment
Optical Path Difference
The difference between the optical lengths of two sources or points. (n2l2-n1l1). This has a relationship with the wavelength that either indicates destructive or constructive interference.
Optical path length?
Constructive interference (OPD)
Constructive interference occurs if the OPD = a whole number multiple (m) of wavelengths (lambda).
Wavelength multiple?
Optical Path Length
The geometric length (measured in metres) of the light path * the refractive index of the medium. (e.g. in air: 1, in water: 1.33)
Does refractive index change the path length?
Non-Reflecting Coating
The change in phase (of pi radians) happens such that the separation is lambda/2. When combined with the optical path difference of the coating, there is clearly destructive interference. Only applies to some wavelengths of light.
Remember OPD + phase diff. relationship
Travelling wave
Waves that transfer energy from one point to another with no net mass transfer.
Water waves and buoys.
Plane polarization
When an unpolarized wave is reduced to oscillations in just one plane (e.g. y --> x vertical plane)
Transverse waves with multiple oscillations of the electric field and magnetic induction.