Penetration Depth, Skin Depth
A very similar approach uses the penetration depth:
where is the penetration depth.
The skin depth is defined so that the wave satisfies:
where is the skin depth.
Physically, the penetration depth is the distance which the wave can travel before its intensity reduces by a factor of . The skin depth is the distance which the wave can travel before its amplitude reduces by that same factor.
The absorption coefficient is related to the penetration depth and skin depth by
Read more about this topic: Mathematical Descriptions Of Opacity
Famous quotes containing the words skin and/or depth:
“The work was like peeling an onion. The outer skin came off with difficulty ... but in no time you’d be down to its innards, tears streaming from your eyes as more and more beautiful reductions became possible.”
—Edward Blishen (b. 1920)
“People who comprehend a thing in all its depth seldom remain true to it forever. For they have brought its very depth to light: and there is always so much nastiness to see there.”
—Friedrich Nietzsche (1844–1900)