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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.
The intensity of a sound wave is the amount of power in the wave per unit area and has units of W/m 2. The intensity of a sound wave depends on how far we are from a source. If we label that distance as R, then the sound intensity is. sound intensity = sound power / (4 pi R 2). We now have something that relates to our perception of loudness. This means that we should introduce a logarithmic scale, once again.