Wavelength (λ): In a wave the distance
between any given point and the same point in the next wave cycle.
This can be crest-to-crest, trough-to-trough, null-to-null, etc.
Wavelength is related to energy and frequency by E = hν = hc/λ,
where E = energy, h =
Planck's
constant, ν = frequency,
c = the
speed of light, and λ = wavelength.
Wavelength the distance between any
given point and the same point in the next wave cycle.