4.5 - Wave Properties

4.5.1
1. Reflection- when a wave hits a barrier that it cannot pass through is is reflected
2. Transmission- When a wave passes a boundary between two media some of it will go through, so will be transmitted
3. For a plane wave, the angle of incidence (angle between the normal to the barrier and the rays of the incoming wave) is equal to the angle of reflection (angle between the normal and the rays of the reflected wave)
4. Normally as a wave passes a boundary, some of it reflects and some of it is transmitted
4.5.2
1. Snell's Law
  1. "the ratio of the since of the angle of incidence to the since of the agle of reflection is equal to the ratio of the velocities in the different media"
  2. The ratio between the sine of the angles is called the refractive index. The larer the refractive index, the more the boundary refracts the light
4.5.3
1. Diffraction- If a wave is passingthrough a slit about the size of its wavelength, it will seem to be re-emitted from a point source
2. Example: Light passing through a slit of about 500nm is will spread out, causing a single line if collected on for example a piece of paper
4.5.5
1. Constructive interference- When two waves with a phase difference of a whole wavelength meet they will interfere and create a wave with increased amplitude
2. Destructive interferece- When two waves with a phase difference other than a whole wavelength meet they will interfere to produce a wave of decreased amplitude

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