waves

• waves = carriers of energy
• vibration = a repeated motion and produced by a back-and-forth or up-and-down movement of an object
• wave = a traveling disturbance that carries energy from one place to another with or without a medium
• medium = a substance or material that carries the wave
• mechanical wave = requires a medium to propagate
• electromagnetic wave = does not require a medium to propagate
• wave according to the direction of motion of the vibrating particles = transverse, longitudinal, surface
• transverse wave = a wave in which particles of the medium move in a direction perpendicular to the direction where the wave moves
• longitudinal wave = particles of the medium move in a direction parallel to the direction where the wave moves
• longitudinal wave = compressions, rarefractions
• surface waves = particles of the medium undergo a circular motion
• parts of a wave = crest, wavelength, amplitude, equilibrium position, trough
• symbol of wavelength = lambda
• lambda is measured in = meters
• symbol of frequency = Hz
• frequency = is the number of waves passing through a given point in one second
• 1 second = 2 wave cycles = 2 Hz
• period = is the time taken to generate one complete wave
• period = second
• wave speed = how far a wave moves in a given amount of time
• wave speed = frequency x wavelength