SKU: 21423239051

The Physical Principles of the Quantum Theory

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The Physical Principles of the Quantum TheoryThe contributions of few contemporary scientists have been as far reaching in their effects as those of Nobel Laureate Werner Heisenberg. His matrix theory is one of the bases of modern quantum mechanics, while his "uncertainty principle" has altered our whole philosophy of science. In this classic, based on lectures delivered at the University of Chicago, Heisenberg presents a complete physical picture of quantum theory. He covers not only his own

The contributions of few contemporary scientists have been as far reaching in their effects as those of Nobel Laureate Werner Heisenberg. His matrix theory is one of the bases of modern quantum mechanics, while his "uncertainty principle" has altered our whole philosophy of science.
In this classic, based on lectures delivered at the University of Chicago, Heisenberg presents a complete physical picture of quantum theory. He covers not only his own contributions, but also those of Bohr, Dirac, Bose, de Broglie, Fermi, Einstein, Pauli, Schrodinger, Somerfield, Rupp, -Wilson, Germer, and others in a text written for the physical scientist who is not a specialist in quantum theory or in modern mathematics.
Partial contents: introduction (theory and experiment, fundamental concepts); critique of physical concepts of the corpuscular theory (uncertainty relations and their illustration); critique of the physical concepts of the wave theory (uncertainty relations for waves, discussion of an actual measurement of the electromagnetic field); statistical interpretation of quantum theory (mathematical considerations, interference of probabilities, Bohr's complementarity); discussion of important experiments (C. T. R. Wilson, diffraction, Einstein-Rupp, emission, absorption and dispersion of radiation, interference and conservation laws, Compton effect, radiation fluctuation phenomena, relativistic formulation of the quantum theory).
An 80-page appendix on the mathematical apparatus of the quantum theory is provided for the specialist.



Binding Type: Paperback
Publisher: Dover Publications
Published: 06/01/1949
ISBN: 9780486601137
Pages: 208
Weight: 0.45lbs
Size: 8.00h x 5.40w x 0.50d
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SKU: 21423239051

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Kristi V.
Carnegie, US
★★★★★ 4
Almost perfect...upraised logo should be left off
This toy is great for relentless chewers with strong jaws! It would be almost perfect if it didn't have a "K9" logo in raised rubber on it. That is the place that my aggressive chewer shepherd/bulldog mix focuses on and is able to get small chunks off. Without that logo, he would chew the ball more evenly, instead of fixating on that one spot. He loves this ball and has chewed on it for about an hour off & on each of the 11 days he has had it. Although it is very durable so far, the flaw is the upraised logo.
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Reviewed in the United States on January 22, 2026
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Ryan
Dallas, US
★★★★★ 5
Perfect for High-Drive Dogs & Surprisingly Durable (six month review)
I use this ring ball for structured fetch and tug sessions with my high-drive German Shepherd mix (91 lbs. at 10 mon.), and it’s easily the best toy we’ve added to our routine. What makes it truly exceptional is how it allows my dog to engage in the full canine predatory sequence: • Chase: He locks in visually and bolts after the ring when I throw it. • Grab & Hold: He brings it back, pins it against my leg, and bites down firmly (the toy—not the leg!)—his way of acting out the natural catch-and-control behavior. • Unalive & Tug: We finish with a strong tug session, which satisfies his instinct to grip and shake—basically his version of “making the toy unalive.” • Settle & Chew: Afterward, he relaxes with a chew toy or eats—completing the full physical and mental cycle in a healthy, balanced way. Durability is outstanding—this toy stands up to intense tug sessions with no tearing or damage, even with a 91 lb powerhouse. My senior dog also joins in for double tug play, and it holds up beautifully to that too. I don’t leave this toy down for chewing—it’s not a chew toy. I use it specifically for fetch and tug, then put it away when we’re done. This keeps it exciting and extends its lifespan. My dog has other chew toys he can use freely throughout the day. This isn’t just another fetch toy—when thoughtful it provides a structured, instinct-satisfying experience that’s mentally enriching and physically engaging. If you have a high-drive or working breed, or a dog who thrives on interactive play, this ring ball is 100% worth it.
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Reviewed in the United States on March 30, 2025
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Arnie
Los Angeles, US
★★★★★ 5
Good Toy
Pattern Name: Pull Monkey
Good quality. My dog loves it and it’s holding up to his attacks. It’s also adorable and cuddly. The rope part is sturdy.
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Reviewed in the United States on May 20, 2026
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Angela Chestnut
Houston, US
★★★★★ 5
Great value, durable with a great squeaker!
Pattern Name: Pull Monkey
Durable dog toy! She loves playing tug of war!
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Reviewed in the United States on May 16, 2026
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Stacie
Belleville, US
★★★★★ 5
This baby "takes a licking and keeps on ticking"!
Pattern Name: Platypus
I have three Labs who LOVE playing tug of war with each other and their human family. I bought this stretchy plushie on a whim and it has become one of their favorites! Our pups pull HARD and this thing can TAKE IT without ripping or losing it's elasticity. It does have some holes and has lost an ear, but it is still functional - just a bit raggedy. ANY plushie that lasts more than a couple days with these ladies is a winner...and this one has been played with daily for several WEEKS at this point! If you have strong pullers who also like the soft, squeaky feel of a plushie, this toy is a sure bet.
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Reviewed in the United States on January 18, 2025

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