Final answer:
The wavelength can be measured using Planck's equation or by measuring the distance between two adjacent points in phase. In the context of measuring the speed of light, the distance between two high intensity sections can be used to determine the wavelength. The wave velocity can be calculated by using the equation v = λf.
Step-by-step explanation:
The wavelength, represented by the Greek letter lambda (λ), is measured in meters (m).
One way to measure the wavelength is by using Planck's equation and converting units from nanometers to meters. Another way is to measure the distance between any two adjacent points that are in phase.
For example, in an experiment to measure the speed of light using a microwave oven and a slice of bread, the wavelength can be measured by finding the distance between two high intensity sections which are one-half wavelength apart.
The equation v = λf can be used to calculate the wave velocity by knowing the wavelength (λ) and frequency (f) of the wave.