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<blockquote data-quote="Umbran" data-source="post: 2401628" data-attributes="member: 177">IAAPhysicist:An additional item to consider - Light can be described as both particle and wave.&nbsp; The trick is to choose which description makes sense in a given situation.A photon is not a &quot;thing&quot; in the normal sense, as it is different from most other &quot;things&quot; in the universe.&nbsp; In this case, it is far more sensible to consider it as a wave - merely the propagation of energy through a field in space.&nbsp; If it isn't an object, you don't consider it's subjective clock.&nbsp; Of course time doesn't pass for a thing when the thing does not exist <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":)" title="Smile&nbsp; &nbsp; :)"&nbsp; data-smilie="1"data-shortname=":)" />As for a couple of other items - Black holes do or don't have size, depending upon what you are talking about.&nbsp; The &quot;event horizon&quot;, the volume from which light cannot escape, has a definite size.&nbsp; The singularity at the center, however, does not have size in the conventional sense.An object may be able to move faster than lightspeed within the Schwartzchilde Radius, but the point is rather moot.&nbsp; The Universe at large recieves no information about what is going on inside the black hole.&nbsp; If it does move faster than light, we'd never hear about it.&nbsp; Tree falling in a forest when nobody can hear it, and all that....</blockquote>

[QUOTE="Umbran, post: 2401628, member: 177"] IAAPhysicist: An additional item to consider - Light can be described as both particle and wave. The trick is to choose which description makes sense in a given situation. A photon is not a "thing" in the normal sense, as it is different from most other "things" in the universe. In this case, it is far more sensible to consider it as a wave - merely the propagation of energy through a field in space. If it isn't an object, you don't consider it's subjective clock. Of course time doesn't pass for a thing when the thing does not exist :) As for a couple of other items - Black holes do or don't have size, depending upon what you are talking about. The "event horizon", the volume from which light cannot escape, has a definite size. The singularity at the center, however, does not have size in the conventional sense. An object may be able to move faster than lightspeed within the Schwartzchilde Radius, but the point is rather moot. The Universe at large recieves no information about what is going on inside the black hole. If it does move faster than light, we'd never hear about it. Tree falling in a forest when nobody can hear it, and all that.... [/QUOTE]

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