# Electromagnetic penetration depth

When electromagnetic radiation is incident on the surface of a material, it may be partly reflected from that surface and there will be a field containing energy transmitted into the material. Everyone who loves science is here! By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. If you take the curl of the third equation, and take Ohm's law as an equality, then you get. From Wikipedia, the free encyclopedia.

If you take the curl of the third equation, and take Ohm's law as an equality, then you get.

## Penetration depth

If you take the curl of the third equation, and take Ohm's law as an equality, then you get. If you make an plane-wave solution ansatz, you can look for the required dispersion relation i. Log in or Sign up. These energy are at all sorts of values so there is no simple formula representing this type of absorption. The wave falls perpendicular onto a metal. It should also be noted that we are only specifying the decay of the field which may be due to absorption of the electromagnetic energy in a lossy medium or may simply describe the penetration of the field in a medium where no loss occurs or a combination of the two. For a given material, penetration depth will generally be a function of wavelength.

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