Waves
Formula for frequency of a wave
Frequency = speed/wavelength ƒ = V/λ
What is the relationship between frequency and amplitude?
Frequency is the number of waves per cycle, while amplitude is the height of a wave. If the frequency is high, the amplitude of a wave is also high. In sound, the amplitude is the pitch.
What is the relationship between frequency and wavelength?
Frequency is the number of waves per cycle, while wavelength is the distance between two crests. They are inverse; the higher the frequency, the shorter the wavelength. The lower the frequency, the bigger the wavelength.
Formula for Period
Period = 1/frequency T = 1/f
variable = T
Period; the reciprocal of frequency; the time needed for one wave to pass through a certain point
What is the relationship between frequency and the amount of energy transferred in a wave?
The amount of energy transferred by waves in a given time is proportional to its frequency. For example, if the frequency doubles, the amount of energy transferred by the wave also doubles.
Period
The reciprocal of frequency, or the time needed for one wave to pass through a certain point
Formula for velocity of a wave
Velocity = frequency x wavelength V = ƒλ
Formula for wavelength of a wave
Wavelength = speed/frequency λ = V/ƒ
electromagnetic waves
a form of energy that can travel through space; or light waves
frequency
a measure of the number of times a wave cycles per unit of time (usually 1 second); unit is Hertz (Hz).
waves
a repeating pattern with a specific wavelength, frequency, and amplitude
variable = ƒ
frequency; the number of wave crests that go through a point in a certain time; unit is cycles/s or Hz
wavelength
the distance between consecutive crests or consecutive troughs
crest
the highest point of a wave
trough
the lowest point of a wave
amplitude
the vertical distance from its equilibrium point to its crest, or from its equilibrium to its trough
variable = v
wave velocity; the speed that waves are moving in a direction; unit is m/s
variable = λ
wavelength; the distance between wave crests; unit is m
longitudinal wave
waves that move back and forth, or a parallel to the direction
transverse wave
waves that moves up and down, or perpendicular to the direction
mechanical waves
waves that require a medium to travel