Wavelength

Wave length is the distance between two peaks in a wave. UV, or ultraviolet, light is an   form of electromagnetic radiation that has a shorter wavelength than the light humans can see.  Comparing the or UV with that of visible light UV carries more energy.
It also sometimes break bonds between atoms and molecules thereby altering the chemistry of  materials that are exposed to it.   It also gives rise to fluorescence in some materials.

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Visible light produces he colors red (R), orange (O), yellow (Y), green (G), blue (B), and violet (V) colors.   Ultraviolet is beyond this visible spectrum.   Ultraviolet wavelength has shorter wave length than visible light ,  but more energy than violet light.  The wave length of Ultraviolet ranges between 10nm(nanometer) to 400 nm.   Ultraviolet spectrum is divided into near ultraviolet, the far ultraviolet and the extreme ultraviolet.


Scientists have tried differentiating the ultra-violet part of the spectrum into 03 specific regions: the near UV, the far UV, and the extreme UV.
These 03 regions are then further distinguished by the level of energy of the ultraviolet radiation, and by the "wave length" of the ultraviolet light, which is related to energy

Wavelength energy:  The amount of energy is inversely related to the wave length of the light: the shorter the wave length, the greater the energy of each photon of the light.  The relation between energy to wavelength is

E = hc/ λ      or     λ =  hc/E

here E denotes Energy, h denotes plancks constant
h denotes  Planck constant (6.62606896×10−34 Js)
c denotes  speed of light
λ denotes wave length

Is this topic wavelength equation hard for you? Watch out for my coming posts.

The relation between wavelength and energy was invented by Max Planck who identified a co-efficient of proportionality that related a photon's energy to its frequency. This co-efficient is known as the Planck constant and allows photon energy found by using the following relation.

The speed of a wave can be written as speed = wave length/period.  Here the period of the wave is the time the particles to make one complete vibration cycle.   We know that speed = distance/time. Using this we can write the speed of wave as

Speed = wave length/period

Period = 1/ λ.   So   v =  f λ
The above equation is known as the frequency wave length formula   It states the mathematical relationship between the speed (v) of a wave and its wave length (λ) and frequency (f). Using the symbols v, , and f, the equation can be rewritten as

V = f λ

Frequency = speed of light / wave length      ie   f  = v/ λ