"All the World's a Stage We Pass Through" R. Ayana

Showing posts with label radio waves. Show all posts
Showing posts with label radio waves. Show all posts

Tuesday, 7 September 2010

The Dual-Slit Experiment Myth

The Dual-Slit Experiment Myth

 

by Colin Hill

 

The results of the classic dual-slit experiment were garbled long ago. The misinformation has prompted a spurious metaphysical explanation, where mundane physics suffices:

 http://micro.magnet.fsu.edu/primer/java/interference/doubleslit/doubleslitjavafigure1.jpg
 

There are two classic dual-slit experiments. In the first, both slits are illuminated. The second holds that light is made to pass through only one.  The accepted error is that there is no difference between the two respective interference patterns. As will be explained, this is not so.

In the latter, light “quanta” passing through one slit are, perforce, represented as knowing of the presence of the second. Worse, it has become accepted that a “quantum” of light can be in two places at once!

This legacy has engendered much of the illogicality in QM and the “dual nature” of light has acquired near-total credence. Indeed it has become a matter of perverse pride that QM is not logical. A best-selling author wrote:

“Quantum entities not only seem  to be able to pass through both holes at once, but to have an awareness of past and future, so that each can choose to make its own contribution to the interference pattern in just the right place to build the pattern up without destroying it”.

 And:
“The quantum entities seem to know when you are watching them and adjust their behaviour accordingly. Each single quantum entity seems to know about the whole experimental set-up, including when and where the observer is choosing to monitor it, and about the past and future of the experiment”.

But the two interference patterns are very different, as made plain by Max Born. In 1935, in his book “Atomic Physics” Blackie and Son, he contrasted the two patterns: the first, with all the maxima “equally bright”, the other, where “their intensity falls off from the middle outwards”.

This mimics pairs of radio antennae. Not surprising. Since both radio and light waves are electromagnetic, both engender interference when two or more sources interact. Radiation diagrams below show the contrasts at both radio and light frequencies.

Hence :

1. A wave-front can, at once, impinge on both adjacent slits.
2. Light behaves much like radio waves.
3 Slits and antennae are both resonant elements.
4. Both can absorb and re-radiate incident electromagnetic energy.
5. A slit can behave like a driven antenna element.
6. A slit can also behave like an undriven (parasitic) antenna element.
7. Two adjacent illuminated slits correspond to the two driven antennae of a standard radio interferometer.
8.  Electrons and light “quanta are members of a self-similar fractal hierarchy.

 

Conclusions
From the radio antenna paradigm:-

Telecomm. technology provides a better explanation of the dual-slit experiment than does the quasi-scientific version.

Slits behave like tuned (resonant) antenna elements.

No evidence is apparent here of particles/photons or of wave/ particle duality.
Light is apparent only after the incidence of electromagnetic waves on macro surfaces (groups of atoms).

The purported “awareness” and “consciousness” are neither manifest nor pertinent. Similarly the concept of “Existence through Observation”.

The radio equivalent of an un-illuminated slit is the un-driven, or parasitic, element of the standard Yagi (TV) antenna. As in fig 2b above

The inference is that De Broglie’s quantum frequency changes are more likely than positional jumps,  which also fits in with the idea that the universe is fractally organised.


Copyright © 2010 Colin Hill · Fractal Universe @ http://www.fractaluniverse.org/v2/?page_id=614

 
Xtra Image - http://micro.magnet.fsu.edu/primer/java/interference/doubleslit/doubleslitjavafigure1.jpg


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Sunday, 10 January 2010

California gives green light to space solar power

California gives green light to space solar power


In space solar power concepts, solar panel arrays would gather sunlight in orbit, then beam it to Earth (Illustration: Mafic Studios)
In space solar power concepts, solar panel arrays would gather sunlight in orbit, then beam it to Earth (Illustration: Mafic Studios)

 

Energy beamed down from space is one step closer to reality, now that California has given the green light to a deal involving its sale. But some major challenges will have to be overcome if the technology is to be used widely.

On Thursday [Dec 3, 2009], the California Public Utilities Commission gave its blessing to an agreement that would see the Pacific Gas and Electric Company buy 200 megawatts of power beamed down from solar-power satellites beginning in 2016.
A start-up company called Solaren is designing the satellites, which it says will use radio waves to beam energy down to a receiving station on Earth.

The attraction of collecting solar power in space is the virtually uninterrupted sunshine available in geosynchronous orbit. Earth-based solar cells, by contrast, can only collect sunlight during daytime and when skies are clear.

Launch costs

 

But space-based solar power must grapple with the high cost per kilogram of launching things into space, says Richard Schwartz of Purdue University in West Lafayette, Indiana. 

Schwartz chaired a US National Academies committee that in 2001 wrote up an assessment of NASA's space-based solar power research. "If you're talking about it being economically viable for terrestrial power, it's a tough go," he says.

Cal Boerman, Solaren's director of energy services, says the company designed its satellites with a view to keeping launch costs down. "We knew we had to come up with a different, revolutionary design," he says. A patent the company has won describes ways to reduce the system's weight, including using inflatable mirrors to focus sunlight on solar cells, so a smaller number can collect the same amount of energy.

Stay cool

 

But using mirrors introduces other challenges, including keeping the solar cells from overheating, says Schwartz. "You have to take care of heat dissipation because you're now concentrating a lot of energy in one place," he says.

According to the company's patent, Solaren's solar cells will be connected to radiators to help keep them cool.

Though Boerman says the company believes it can make space-based solar power work, it is not expecting to crowd out other forms of renewable energy. Laws in California and other states require increasing use of renewable energy in coming years, he points out. "To meet those needs, we're going to need all types of renewable energy sources," he says.

08 December 2009 by David Shiga

From New Scientist –


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