At a recent checkup, I was shocked: Even though I was eating foods rich in saturated fat and a seemingly more indulgent diet, my total cholesterol was down 10 points, my bad LDL cholesterol was stellar, and my good HDL was the highest it's ever been.
As the frequency of the signal to be measured increases to approach the frequency of the source frequency, measurement error increases. To improve the accuracy of the frequency measurement for higher unknown frequency, we can use this second measurement method, count number of pulses in known time.
The amplitude is the distance from the medium to the crest. The wavelength is the distance between crest to crest or from trough to trough. A wave also has a frequency. A frequency of a wave is the amount of waves that pass through a point in a certain amount of time. The frequency of waves is measured in hertz or Hz. In a wave speed, frequency, and wavelength are much related. For example to find the speed of a wave you have to multiply wavelength time's frequency.