Quote:
Originally Posted by Clondike Clad
How in the he!! CAN AN IR LED XMIT DEEP IN THE GROUND.
WHAT AM I MISSING????????
THE LOW POWER OF IR LED WILL NOT GO DEEP AT ALL IN THE GROUND.
I BETTER GO BACK TO LURKING BEFORE I TALK TOO MUCH.
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Seems to me that the idea underlying is that the IR radiation will generate a charge accumulation there...
Of course, some EM radiations can do that things for sure... think e.g. at X-rays or gamma or even UV light... but IR is a bit unusual about that.
I know that very thin layers of e.g. gold or aluminium can be electrized by incoming radiations if they have enough energy... and ok... the energy is a direct consequence of frequency.
At Higher freqs (UV,x-ray, gamma) the effect is enhanced but can show up also on thin layers (few atoms!) with lower freqs...
I remember that e.g. Nasa made thin layers in astronauts suites ...expecially the glass cover that they use to repair from Sun's radiations when exposed to them...maybe they conducted a serious study about thin layers and EM spectrum effects... who knows ?
Kind regards,
Max