electromagnetic radiation

[hiker]

might want to check this out.........think its time  to toss my big old monitor...

     http://www.heliognosis.com/rd.html

[drdongle]

Electro magnetism is not a radiation, it is a field and it will collapse when the excitation is removed. Radiation goes on for ever unless blocked/ absorbed by a medium with sufficient density.

[mtbandy]

The CFL bulbs are particularly annoying. I'm not too worried about what they will do to me, but they are electrically very noisy - and interfere with radio equipment, and my guitar amp. I don't know if anyone knows of a 'clean' CFL.

CRT monitors and TVs I would be tempted to replace, because of the x-ray emissions amongst other things. Not really a problem if you're sitting far enough back, but daily exposure can build up if you're sitting right in front of a tube every day, like I was until fairly recently.

Electrical noise can be quite annoying, my most recent problem is my solar controller - firstly it contains a small switch mode power supply, more of an isolated power supply for powering itself. This is extremely noisy and it's on 24/7, nothing I can do about that except screening. Secondly, this was the big one, when my battery reached full charge the solar controller 'pulses' the charge on and off. In full sun it is therefore pulsing on and off a 25 meter piece of cable at several Hz! I could hear that on radios, amps, all sorts. I fixed it with a large capacitor at the controller end.  

[stephent]

About the only thing we are exposed to now that has been proven several times over to be safe is the cell phone. Most major cell companies have paid big bucks to get data (or suppress it) to show you it is safe to have it stuck close to your brain (tee hee).

And I do have some ocean beach front property close by where I live to sell if anyone is interested.

Electro-magnetic radiation  like the E or H field does not collapse when excitation is removed, it travels just like it started off doing--until absorbed, but never completely dies off. It's just not detectable at low levels.

That's why sonar, bouncing RF off of the moon, radar works so well.

That's why Radio Astronomy works.

And yes--we are exposed to the greatest source of EM Radiation in this solar system every day for 24/7/365 for our entire lives--the sun. Man made crap is puny compared to  this.

Which I agree we have too much of floating around, but who wants to go back to living in caves?--- (wdyasq's opinion not counting here of course)

[TomW]

Stephent;

Well, actually, it is RossW who lives in a cave,albeit a very modern cave.

[stephent]

Yeah and Ross lives like a bat in the dark cave too---just ask him how his server room is lit usually. :-)

[rossw]

Whoa there, steady on a moment....

"Radiation" is a term to describe a process.

I think, from the context of your original, you have interpreted "radiation" as "ionising radiation" (eg, uranium)

LIGHT is radiation.

RADIO WAVES are radiation.

They are magnetic (or electro-magnetic) radiation generally falling into the category of "non-ionising radiation".

There is evidence that at adequate power densities, even non-ionising radiation is damaging to tissue and at a cellular level, there is debate at what point such effect stops (or merely becomes unmeasurable).

Also, for the later poster who refers to SONAR in the context of electromagnetic field/wave, I hate to remind you that SONAR is SOUND and relies on physical pressure wave in the intermediate space. SONAR doesn't work for example, in space. Your ultrasonic parking sensor won't help you avoid backing into the space station! <g>

(And yes, Tom and Stephen - I may be a modern cave dweller, living in the dark and all, but I leave a negative carbon footprint nowdays!)