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So using the standard equation: E = hf, we can find the relationship between light intensity and wavelength as follows: c = lambda x f Therefore, f = c/lambda substitute this in the standard equation to get: E = (h c)/lambda Where h = planks constant, and c = speed of light.
In general, an Intensity is a ratio. For example, pressure is the intensity of force as it is force/area. Also, density (symbol Ï) is the intensity of mass as it is mass/volume. The Intensity of waves (called Irradiance in Optics) is defined as the power delivered per unit area. The unit of Intensity will be W.m -2. The wave energy comes from the simple harmonic motion of its particles. The total energy will equal the maximum kinetic energy.