> Yes, so it takes a cellphone way longer to cook your brain. A rough > estimate: only 30% of radiated RF from phone enters brain, let's keep > that at only 100 mW. A microwave big enough for my head is indeed > 1000W. So with only 100mW the phone needs 10,000 times as long to > damage my brain compared to the microwave. So, how long does the 1000W > microwave need to damage my brain? 5 seconds? times 10,000 = less than > 14 hours. > > But I don't believe that freqs closer to wifi damage my brain much more > than freqs that are 0.5 GHz lower as long as the RF level is the same. > Brains cells know nothing of wifi frequency. Although I can believe > that they optimized microwave frequency for it's purpose, I don't think > that the difference between 1.9 and 2.45 GHz matters much in the amount > of damage done.
Say your microwave cooks a pizza in 100 seconds at 1,000 watts (ie: 100 kJ of delivered energy). By your reasoning, I can accomplish the same effect by leaving the pizza next to a 25 watt lightbulb (say 10 watts actually hitting the pizza) for about 3 hours. Try it sometime --- it won't work! You're misunderstanding the basic physics here. Why does your pizza cook? Your pizza cooks because you heat it up. It heats up because at 1,000W, the microwave hits it with far more energy than it can dissipate. That excess energy is stored, increasing the temperature of the pizza. On the other hand, the pizza can probably easily dissipate 10W. You can leave the 25 watt lightbulb next to it for days and its temperature won't increase much at all. Remember, your brain uses about 20W on average. All that energy is turned into heat, and your brain must be equipped to dissipate it (otherwise, it would heat up and you'd die). Given that, an extra 100 mW or so isn't going to do anything to it. Also, frequency does matter. There is a reason microwaves operate at 2.45 GHz. That is a resonant frequency of water. When you bombard food with high-energy RF at that frequency, the water in the food resonates, absorbing the RF energy. Once you go a little bit off that frequency, the resonance effect stops, and most of the RF energy goes right through the food instead of being absorbed by it. If you ran your microwave at 1.9 GHz, even at 1,000W, it wouldn't cook your food very well at all. Now you know, and knowing is half the battle. -- rayiner ------------------------------------------------------------------------ rayiner's Profile: http://forums.slimdevices.com/member.php?userid=19928 View this thread: http://forums.slimdevices.com/showthread.php?t=52348 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
