A cup of tea is heated for 20 seconds in a Panasonic NN-E225M microwave oven | |
Problems playing this file? See media help. |
Microwaves have been adopted even more avidly: in 1979, less than 5% of households had one, but by 1998 over 88% did.
Boiling potatoes and microwaving whole potatoes with skin on to make 'microwaved baked potatoes' does not produce acrylamide.1 (Footnote1: Based on FDA studies.)
Wikimedia Commons has media related to Microwave ovens. |
Technology | Range[27] | Directivity[16] | Frequency | Antenna devices | Current and/or possible future applications |
---|---|---|---|---|---|
Inductive coupling | Short | Low | Hz – MHz | Wire coils | Electric tooth brush and razor battery charging, induction stovetops and industrial heaters. |
Resonant inductive coupling | Mid- | Low | kHz – GHz | Tuned wire coils, lumped element resonators | Charging portable devices (Qi), biomedical implants, electric vehicles, powering buses, trains, MAGLEV, RFID, smartcards. |
Capacitive coupling | Short | Low | kHz – MHz | Metal plate electrodes | Charging portable devices, power routing in large-scale integrated circuits, Smartcards, biomedical implants.[4][5][6] |
Magnetodynamic coupling | Short | N.A. | Hz | Rotating magnets | Charging electric vehicles,[25] biomedical implants.[28] |
Microwaves | Long | High | GHz | Parabolic dishes, phased arrays, rectennas | Solar power satellite, powering drone aircraft, charging wireless devices |
Light waves | Long | High | ≥THz | Lasers, photocells, lenses | Charging portable devices,[29] powering drone aircraft, powering space elevator climbers. |
At that time I was absolutely sure that I could put up a commercial plant, if I could do nothing else but what I had done in my laboratory on Houston Street; but I had already calculated and found that I did not need great heights to apply this method. My patent says that I break down the atmosphere 'at or near' the terminal. If my conducting atmosphere is 2 or 3 miles above the plant, I consider this very near the terminal as compared to the distance of my receiving terminal, which may be across the Pacific. That is simply an expression. I saw that I would be able to transmit power provided I could construct a certain apparatus -- and I have, as I will show you later. I have constructed and patented a form of apparatus which, with a moderate elevation of a few hundred feet, can break the air stratum down.