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Physics - Chapter 11 - Waves 1
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- 1Angle of IncidenceThe angle between the direction of the incident ray and the normal at a boundary between two media.
- 2Critical AngleThe angle of incidence at the boundary between two media that will produce an angle of refraction 90 degrees.
- 3Progressive waveA wave that transfers energy as it moves through a medium.
- 4Longitudinal WaveA wave that oscillates perpendicular to the direction it's travelling in.
- 5Transverse WaveA wave that oscillates perpendicular to the direction it's travelling in.
- 6Phase DifferenceThe angular measurement of how much a wave leads/lags.
- 7When does Refraction occur?When a wave changes directions as it changes speed when it passes from one medium to another.
- 8Law of ReflectionAngle of incidence
=
Angle of reflection - 9DiffractionThe spreading of waves.
- 10PolarisationThe phenomenon in which oscillations of a transverse wave are limited to only one plane.
- 11IntensityI=P/A
and
I = amplitude^2
- 12Properties of EM waves.•They can be polarised.
•All travel at same speed in a vacuum. - 13What is an EM wave?Can be thought of as electric and magnetic fields oscillating at right angles to each other.
- 14Define n=c/vn = refractive index.
c = speed of light in air.
v = speed of light in a medium. - 15Total internal reflectionTwo Conditions:
1) Light must be travelling through a medium with a higher refractive index as it strikes the boundary.
2) The angle it strikes the boundary must be above the critical angle.
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- A level (Module 4: Electrons, waves and photons) Physics Fichas sobre Physics - Chapter 11 - Waves 1 , creado por Hanane Boudali el 08/01/2017.
- Creado por
- Hanane Boudali
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