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Centreline is a straight line
Amplitude is the distance between the highest and lowest of the wave to the centre line
the top is called the crest and the bottom is the trough (chrouth)
Same distance in a "perfect world"
The crest to the next crest is called the wavelength
One cycle is called centre to crest to trough to centre
High frequency has lots in a time
Low frequency has little in a time
Transverse wave is like whipping a rope
Particles vibrate at a right angle to the direction of the wave.
Longitudinal wave is slinky spring pushing to either side
Vibrations are parallel to the direction of the wave.
Longitudinal waves are the same as compressional waves Frequency is measured in "hertz"
Sound waves are longitudinal waves.
In solid, sound travels quickly because the particles being so close together; sound hits one particle and bounces to the next one.
Frequency: the number of waves passing through a point in a second
Echolocation is used in boats into water because the sound bounces back from hitting a solid surface.
Electromagnetic energy
Pg 100 all 7 types of waves
radio waves, microwaves, infrared light, visible light, ultraviolet light, X-rays, and gamma rays.
ROYGBIV- RED ORANGE YELLOW GREEN BLUE INDIGO VIOLET
Green leaf
Why is is green? because chlorophyll only reflects only green waves.
December 18th, 2023
Noise cancellation waves
Amplitude 5, noise cancellation -5, wave length at zero 0,
Distructive interference
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