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Department of Physics & Astronomy: Home ... of energy in solar cells. The design incorporates a heat engine photocell that absorbs photons from the sun and converts the photon energy into electricity. Read the whole article here . OUR COSMIC ORIGINS: Stars, Galaxies, and the Stuff ...
What is the mass of a photon? www.math.ucr.edu/home/baez/physics/ParticleAndNuclear/photon_mass ... ... general equation, and that makes it very useful. Is there any experimental evidence that the photon has zero rest mass? Alternative theories of the photon include a term that behaves like a mass, and this gives rise to the very advanced ...
The Human Eye and Single Photons www.math.ucr.edu/home/baez/physics/Quantum/see_a_photon.html ... eye is very sensitive but can we see a single photon? The answer is that the sensors in the retina can respond to a single photon. However, neural filters only allow a signal to pass to the brain to trigger a conscious response when at ...
Photons, Schmotons www.math.ucr.edu/home/baez/photon/schmoton.htm Photons, Schmotons Photons, Schmotons John Baez and Michael Weiss 19972002 Did you ever wonder "What the heck is a photon, anyway?" Well, this question quickly gets you into pretty deep waters. Not only do you need to understand Maxwell ...
Photons, Schmotons www.math.ucr.edu/home/baez/photon/ Photons, Schmotons Photons, Schmotons John Baez and Michael Weiss 19972002 Did you ever wonder "What the heck is a photon, anyway?" Well, this question quickly gets you into pretty deep waters. Not only do you need to understand Maxwell ...
The Casimir Effect www.math.ucr.edu/home/baez/physics/Quantum/casimir.html ... in agreement with the theory to within the experimental uncertainty of 5%. Particles other than the photon also contribute a small effect but only the photon force is measurable. All bosons such as photons produce an attractive Casimir ...
Michael Weiss: Hmm, homework on the weekend! math.ucr.edu/home/baez/photon/hwweek.htm ... the weekend! (grumble, grumble) Oh, well, beats cleaning out the attic (``Whaddya mean we have wasps!? Sure they're not photons?'') John Baez assigns: So maybe Michael can remember or figure out the formulas relating the p ...
John Baez: A Gaussian Bump math.ucr.edu/home/baez/photon/gaussian.htm ... the coherent state e icp 0>. This should shed some more light (pardon the pun) on why our previous computations gave a photon density proportional to the amplitude squared and thus the energy density. The thing to understand is why, ...
John Baez: A SixStep Program math.ucr.edu/home/baez/photon/sixstep.htm ... took the classical formula for the energy density of the electromagnetic field, and the quantum formula for the energy of a photon of a given frequency, combined them, and used that to guess the photon density of a plane wave. This is ...
John Baez, Michael Weiss: In Boston, you should definitely co ... math.ucr.edu/home/baez/photon/boston.htm ... 1+1 dimensions  will be but a pale imitation of Nature's wondrous "photons"  massless spin1 particles in 3+1 dimensions. Nonetheless, once Michael understands fotons, photons will be pretty easy. In the last episode, Michael and ...

