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Oct
21
comment How can a photon “stop”? What does its world line look like?
Thanks for answering ACuriousMind. As I stated in my question above, does the worldline of a photon have a well defined beginning and ending, seeing that it is created and destroyed?
Oct
21
comment How can a photon “stop”? What does its world line look like?
The second part of my question was, is there a "complete world line" of a photon?
Oct
21
asked How can a photon “stop”? What does its world line look like?
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Feb
22
comment Surface Area: Volume and its relation with heat
More surface area means more space for heat to leave the body. I'm guessing the "less volume" part means you want more surface area while keeping the volume the same (eg breaking an ice cube to create more surface area but keeping the same exact volume).
Feb
22
comment The physics of sound boards
I'm only guessing, and it's not a mathematical answer. A sound board vibrates at the same frequency your string vibrates, so there's constructive interference. I think it's not that the same energy is able to produce a louder sound with a sound board, but more that that energy would have gone to waste without a sound board.
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