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:
“And even so, he’s stale, he’s been there too long.
Touch him, and you’ll find he’s all gone inside
just like an old mushroom, all wormy inside, and hollow
under a smooth skin and an upright appearance.”
—D.H. (David Herbert)
“Tears, idle tears, I know not what they mean,
Tears from the depth of some divine despair
Rise in the heart, and gather to the eyes,
In looking on the happy autumn-fields,
And thinking of the days that are no more.”
—Alfred Tennyson (1809–1892)