what is the unit of wavelength of light
Wavelength Localized wave packets, "bursts" of wave action where each wave packet travels as a unit, find application in many fields of physics. A wave packet has an envelope that describes the overall amplitude of the wave; within the envelope, the distance between adjacent peaks or troughs is sometimes called a local wavelength.[22][23] An example is shown in the figure. In general, the envelope of the wave packet moves at a different speed than the constituent waves.[24]
Ibn al-Haytham Alhazen showed through experiment that light travels in straight lines, and carried out various experiments with lenses, mirrors, refraction, and reflection.[49] His analyses of reflection and refraction considered the vertical and horizontal components of light rays separately.[50]
Planck constant The Planck constant (denoted h, also called Planck's constant) is a physical constant that is the quantum of action, central in quantum mechanics.
Exponentiation Any nonzero number raised to the 0 power is 1:[11]