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Waves

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1Waves Amplitude, Wavelength, Frequency Frequency = Number of complete waves passing a certain point per secondPitch & Frequency
The higher the amplitude, the louder it is.
The bigger the wavelength, the deeper the pitch.
2Longitudinal Waves They have Vibrations along the same line. The vibrations are parallel to the direction of energy transfer of the wave.Transverse Waves
They have sideways Vibrations
The vibrations are 90°C to the direction of energy transfer of the wave.
3Wave Equation Wave Speed = Frequency X Wavelength (m/s) = (Hz) X (m) v = f X λ V = velocity F = frequency λ = Wavelength
4Wave Properties When waves arrive at obstacles, their direction of travel can be changed This can happen by Reflection Refraction DiffractionReflection of light
It allows us to see objects
ANGLE INCIDENCE = ANGLE REFLECTION
The law of reflection applies to every ray $Wave Properties When waves arrive at obstacles, their direction of travel can be changed This can happen by Reflection Refraction Diffrac...$
5Reflection of Light Light bounces of them into our eyes The normal is an imaginary line that's perpendicular to the surface where the light hits the surface (point of incidence) A Plane Mirror
6Refraction Changing the Speed of a wave can change its direction If a light wave hits the boundary 'face on' it carries on in the same direction If it meets at a different angle the wave changes direction $Refraction Changing the Speed of a wave can change its direction If a light wave hits the boundary 'face on' it carries on in the same di...$
7Diffraction Waves Spreading Out All waves diffract (spread out) at the edges whenever they pass through a gap or pass an obstacle. The amount of diffraction depends on the size of the gap relative to the wavelength of the wave. $Diffraction Waves Spreading Out All waves diffract (spread out) at the edges whenever they pass through a gap or pass an obstacle. The am...$
8EM Spectrum and Communications R - Ronald M - McDonald I - Is V - Very U - Unusual (and) X -Xtra G - Groovy
9X-ray Uses Fractures and breaks. Problems with teeth, Thinning and weakening of the bones Bone infectionUltra Violet Uses
Sun beds
Security pens
Fluorescent lights
10Red-Shift The universe seems to be expanding Light from other galaxies is red-shifted The further away, the greater the redshiftThe Big Bang
Cosmic Microwave Background Radiation
(CMBR)
Scientists have detected low frequency electromagnet radiation from all parts of the universe.