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Philosophy, Metaphysics & the Afterlife
What can move but has no room to
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<blockquote data-quote="Harte" data-source="post: 190918" data-attributes="member: 443"><p>Wrong. It's not true that Relativity wouldn't allow a zero mass photon.</p><p>In fact, it is relativity that <em>gave</em> us the zero mass photon.</p><p>That's because the zero part is a photon's "rest mass." Of course, like everything else, they're never "resting."</p><p>The mass of the photon that gives it momentum (so that a light sail would work, for example) is it's <em>relativistic</em> mass. The momentum of photons has been known about for quite some time now. This thing was invented in the late 1800's:</p><p><img src="https://upload.wikimedia.org/wikipedia/commons/1/1d/Crookes_radiometer.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>A photon gains mass with velocity, just like you do.</p><p></p><p>You can read more about photon mass here: <a href="http://math.ucr.edu/home/baez/physics/ParticleAndNuclear/photon_mass.html" target="_blank">Link</a></p><p></p><p></p><p></p><p>All true, and virtual particles might provide insight into how the Big Bang happened.</p><p></p><p>Harte</p></blockquote><p></p>
[QUOTE="Harte, post: 190918, member: 443"] Wrong. It's not true that Relativity wouldn't allow a zero mass photon. In fact, it is relativity that [i]gave[/i] us the zero mass photon. That's because the zero part is a photon's "rest mass." Of course, like everything else, they're never "resting." The mass of the photon that gives it momentum (so that a light sail would work, for example) is it's [i]relativistic[/i] mass. The momentum of photons has been known about for quite some time now. This thing was invented in the late 1800's: [IMG]https://upload.wikimedia.org/wikipedia/commons/1/1d/Crookes_radiometer.jpg[/IMG] A photon gains mass with velocity, just like you do. You can read more about photon mass here: [URL='http://math.ucr.edu/home/baez/physics/ParticleAndNuclear/photon_mass.html']Link[/URL] All true, and virtual particles might provide insight into how the Big Bang happened. Harte [/QUOTE]
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What can move but has no room to
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