upstroke
Wavelength
a wavelength is a distance between consecutive wave crests
The distance between these two points is termed as a wavelength.
It is referred to as an interval.
one wavelength
The wavelength.
Two consecutive points in phase are one wavelength apart.
In science there are usually infinitely many points between any two points so that there is no such thing as a consecutive point!
one weave length
class width
They are the class widths.
Time.