Waves

• The two types of waves are the longitudinal and transverse waves.
• The medium particles of a longitudinal wave vibrate parallel to the motion of the pulse.
• Sound waves are longitudinal waves.
• The two parts of longitudinal waves are Compression and Rarefaction.
• Compression is where the particles are close together.
• Rarefaction is where the particles are spread apart.
• you can feel energy more in compression.
• In a transverse wave, the pulse travels perpendicular to the disturbance.
• Crest - positive or upward displacement
• Trough - negative or lower displacement
• The equillibrium represents the flat line or the undisturbed.
• The dashed line is the equillibrium.
• The distance of the wave from the equilibrium is called the amplitude.
• The distance between two consecutive waves or the length of the wave pulse is called the wave length.
• The wave frequency is the number of wavelengths that pass a fixed point each second.
• When frequency increases, wavelength decreases.
• There are two types of changing in wave direction and they are reflection and refraction.
• Reflection is the bounce of wave.
• Refraction is the speed change and the bending of light.