Wireless power transfer a reality!

Roughly 5 parts per billion of the sun's output hits Earth. That's even worse than MIT's 20% wireless transfer efficiency. Of course, the sun doesn't have a degree from MIT.

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John Larkin Highland Technology Inc

Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multichannel arbitrary waveform generators

What did Tesla get?

The sun's not a germophobe either.

About that part of the Sun's release that DOES hit us...

I get about 0.5 parts per billion.

Distance from center of sun to earth = 93 million miles. Surface area of a sphere at earths orbit is: A = 4 * Pi * r^2 A = 4 * 3.14 * (93*10^6)^2 A = 1.09*10^17 sq miles

Diameter of earth is 8000 miles Area of disk that captures the sun's light: A = Pi * r^2 A = 3.14 * (4000)^2 A = 5.02*10^7 sq miles

Dividing: 5.02*10^7 / 1.09*10^17 = 0.46*10-9 or 0.5 parts per billion.

I did it in my head. Only one order of magnitude off!

I received a BSEE from Cal Poly, Pomona on the condition that I would go away and never return.

I'm rather impressed. I did it with an HP41CX calculator 3 times before I got it right on the 4th try. Trial and much error versus brain power.

Anyone who learned science with a slide rule, or maybe a 4 function calculator, knows how to deal with order of magnitude problems, which are usually done in one's head or on scratch paper. After scientific calculators, it became a lost art. I found this out when I gave a slide rule demonstration at the local high skool. When I mentioned that one separately works the value on the slide rule, and the order of magnitude with a pencil and paper, they looked shocked. They expected to just read the entire value off the slide rule as in a scientific calculator.

The sun has enough degrees already...

Good one!

It's for sure impossible to not transfer money...

Headline: £13bn Iter project makes breakthrough in the quest for nuclear fusion Substance: There is at least another decade of building work and a further decade of testing before the reactor will be allowed to ?go nuclear?.

On a sunny day (Sat, 27 Apr 2013 20:18:17 -0700 (PDT)) it happened snipped-for-privacy@yahoo.com wrote in :

ITER is a joke, that tokamak will never break even.

It is a prime example of the SIC (Scientific Industrial Complex). Some politicians call it 'job creation'.

Other examples are CERN (for retarded photonists), LIGO (For Einsteins devotees), and the recent US No Ignition Facility that failed.

Those projects are probably dremt up by the same guy who wrote the AD9761 datasheet. Man do I have problems with that chip.

worse

have a

hi Jeff,

I didn't see your calculations take into account the 'spectral' ocntent of energy.... like eactly WHAT does the magnetic field do to the stream of .... ;)

Groan...

worse

It didn't include anything exotic. Note that I said "Area of disk that captures the sun's light" so as not to invite comments like the effect of the earth's 0.367 albedo, using coronal mass ejection for power generation, atmospheric absorption, adjustments for political position, etc. I also used average values for the orbital radius and diameter of the earth. If you want more than 2 decimal place accuracy, please refer to your favorite AGW calculation.

It takes something the size of the sun to measure photon deflection by gravity. I would call it insignificant.