A simple Q. but not a simple A,,
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From: Spencer Spindrift on 26 Dec 2009 22:16 On 27 Dec, 00:37, eric gisse <jowr.pi.nos...(a)gmail.com> wrote: > Spencer Spindrift wrote: > > Q.: How is it that a photon has momentum but no mass? > > Or in other words how does light carry energy? > > As far as I know momentum is a property of moving or spinning > > mass. > > A photon cannot have mass or it would be infinite at C.. > > > A.; ??? > > Fields carry energy and momentum. Well that's a VERY simple answer. Why is it forbidden to SHOUT in froups? Another simple Q. but OT.....
From: Sam Wormley on 26 Dec 2009 23:27 On 12/26/09 9:16 PM, Spencer Spindrift wrote: > On 27 Dec, 00:37, eric gisse<jowr.pi.nos...(a)gmail.com> wrote: >> Spencer Spindrift wrote: >>> Q.: How is it that a photon has momentum but no mass? >>> Or in other words how does light carry energy? >>> As far as I know momentum is a property of moving or spinning >>> mass. >>> A photon cannot have mass or it would be infinite at C.. >> >>> A.; ??? >> >> Fields carry energy and momentum. > > Well that's a VERY simple answer. > > Why is it forbidden to SHOUT in froups? Another simple Q. but OT..... Like any institution, people feel comfortable if there are rules, traditions and protocols that most people follow. For, example, if we smell a homework problem, we encourage the poster to do his/her own work, for that is how they learn.
From: eric gisse on 26 Dec 2009 23:37 Spencer Spindrift wrote: > On 27 Dec, 00:37, eric gisse <jowr.pi.nos...(a)gmail.com> wrote: >> Spencer Spindrift wrote: >> > Q.: How is it that a photon has momentum but no mass? >> > Or in other words how does light carry energy? >> > As far as I know momentum is a property of moving or spinning >> > mass. >> > A photon cannot have mass or it would be infinite at C.. >> >> > A.; ??? >> >> Fields carry energy and momentum. > > Well that's a VERY simple answer. Oh, you want me to teach 2 semesters of undergraduate E&M to you? > > Why is it forbidden to SHOUT in froups? Another simple Q. but OT.....
From: Benj on 27 Dec 2009 03:19 On Dec 26, 11:37 pm, eric gisse <jowr.pi.nos...(a)gmail.com> wrote: > Oh, you want me to teach 2 semesters of undergraduate E&M to you? The only problem with that "Eric" is that FIRST you'd have to actually LEARN 2 semesters of undergraduate E&M.
From: eric gisse on 27 Dec 2009 03:57
Benj wrote: > On Dec 26, 11:37 pm, eric gisse <jowr.pi.nos...(a)gmail.com> wrote: > >> Oh, you want me to teach 2 semesters of undergraduate E&M to you? > > The only problem with that "Eric" is that FIRST you'd have to actually > LEARN 2 semesters of undergraduate E&M. I have. You? |