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I've heard it put a different way. It's not that UHF will go around buildings but that it will go through them better than than VHF will. If you're inside a metal/concrete building....UHF stands a better chance of reaching out than VHF will. Here, the shorter wavelength will do a better job than a longer one will. Low power signals from handheld radios above HF will be line of sight only and nothing is going to go around anything. A hill or mountain will stop all signals. It's either go over it with height or over it with HF skywave propagation.

Good luck

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I think it is just the opposite...

In conductors, the penetration depth decreases with increasing frequency. More specifically, the penetration depth has to do with the rate-of-change of currents induced in the conductor by the RF field. All conductors have inductance that tends to resist a change in current, not as a 'lumped' parameter characterising the surface as a whole, but of the distributed, volumetric inductance of the material. The faster the current's rate-of-change, the more the intrinsic inductance resists the change and the shallower the RF penetration. The phenomenon even has its own name: skin effect. Google Skin Effect to learn more.

As an aside, electric current tends to flow on the outside of a conductor -- even at zero frequency (DC). It doesn't flow exclusively on the outside, of course, but it prefers this configuration because like-charged particles (in this case, electrons) repel one another and migrate to the surface, which is as far as they can go. In the static case, once the system reaches equilibrium there are no electric fields -- and hence no current flow -- in the interior of a conductor. In the non-static case the system never reaches equilibrium and so we have electric fields -- and therefore currents -- on the inside of the conductor. It's a contest between the volumetric inductance and resistivity (volumetric resistance) of the material. Google Faraday Cage to learn more.

For superconductors there are neither electric nor magnetic fields in the material's interior. Absolutely none. Superconductors are a whole new can of tasty, fascinating worms, but if you're interested, google Meisner Effect.

I thought Part 95 was the "Personal Radio Service" which includes:

Subpart A - GMRS
Subpart B - FRS
Subpart C - R/C
Subpart D - CB
Subpart J - MURS

all as their own separate subparts, not under GMRS, but parallel to it.

In my mind, GMRS includes a segment of frequencies in 462 and 467 MHz, some of which are shared with FRS (and some FRS channels are squeezed between the GMRS channels).