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Waves mercury and venus 2018-03-13 PM 2-06-03 (Mechanical Waves…
Waves
Mechanical Waves
Disturbance in matter that carries energy
Needs a medium
Caused by energy creating vibrations
Transverse
Causes medium to vibrate at right angles
Has crest and trough
Longitudinal
Wave parallel to direction of travel
Compression travels to the rarefaction points
Surface
Travels across a surface separating two media
Up and down and back and forth
Properties of Mech. Waves
Have frequencies
Armount of cycles in given time
Frequency equal to that of vibration source
Wavelength
distances between adjacent crests/troughs or compressions/rarefactions
Wave
Speed
Wavelength times frequency
Amplitude
Displacement from rest position
Greater energy, more amplitude
Electromagnetic Waves
Transverse waves with electric and magnetic fields
Wavelength inversely proportional to frequency
Electromagnetic vs. Mechanical
Electromagnetic doesn’t require a medium
Have same speed in vacuum
(electromagnetic)
