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Groups > sci.physics > #572267
| From | Sylvia Else <sylvia@not.at.this.address> |
|---|---|
| Newsgroups | sci.physics |
| Subject | Re: Eight things you might not know about light |
| Date | 2016-04-22 11:50 +1000 |
| Message-ID | <dnteb5FeahmU1@mid.individual.net> (permalink) |
| References | <I7GdnbLe77Zix4vKnZ2dnUU7-dWdnZ2d@giganews.com> <dno6jhF4ggfU1@mid.individual.net> <WOWdnSW1F50xNIrKnZ2dnUU7-YudnZ2d@giganews.com> <5717c080$0$27711$c3e8da3$fdf4f6af@news.astraweb.com> |
On 21/04/2016 3:46 AM, benj wrote: > On 04/20/2016 12:09 PM, Sam Wormley wrote: >> On 4/19/16 9:07 PM, Sylvia Else wrote: >>> On 20/04/2016 2:21 AM, Sam Wormley wrote: >>> >>>>> 2. Most types of light are invisible to our eyes. >>> >>> That's a rather loose definition of the word "light". Indeed, can light >>> be even divided into types, other than arbitrarily? >>> >>>>> 8. You can collide photons to make particles. >>> >>> What particles can you make by colliding the photons emitted by a VHF >>> radio antenna? >>> >>> Sylvia. >>> >> >> X-ray have enough energy, E = hν = hc/λ , to create electron-positron >> pairs. Gamma, more massive particles. >> > Sam, sam, Sammy! Pairs are NOT made by colliding photons! They are > created from a single photon. Won't you ever learn not to try to post > science here? Journalists know no science. Why do you keep C&P their > screed? A single photon cannot convert into particles (being particles that do not move at the speed of light), because it's impossible for both energy and momentum to be conserved. Sylvia.
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Eight things you might not know about light Sam Wormley <swormley1@gmail.com> - 2016-04-19 11:21 -0500
Re: Eight things you might not know about light Helmut Wabnig <hwabnig@.- --- -.dotat> - 2016-04-19 18:31 +0200
Re: Eight things you might not know about light Sam Wormley <swormley1@gmail.com> - 2016-04-19 11:33 -0500
Re: Eight things you might not know about light Poutnik <poutnik4nntp@gmail.com> - 2016-04-19 18:42 +0200
Re: Eight things you might not know about light Sergio <invalid@invalid.com> - 2016-04-19 18:06 -0500
Re: Eight things you might not know about light benj <nobodyxx@gmail> - 2016-04-20 00:08 -0400
Re: Eight things you might not know about light HVAC <mr.hvac@gmail.com> - 2016-04-20 04:25 -0700
Re: Eight things you might not know about light benj <nobodyxx@gmail> - 2016-04-20 13:23 -0400
Re: Eight things you might not know about light Odd Bodkin <bodkinodd@gmail.com> - 2016-04-20 08:12 -0500
Re: Eight things you might not know about light benj <nobodyxx@gmail> - 2016-04-20 13:26 -0400
Re: Eight things you might not know about light Odd Bodkin <bodkinodd@gmail.com> - 2016-04-20 12:41 -0500
Re: Eight things you might not know about light Sergio <invalid@invalid.com> - 2016-04-20 12:53 -0500
Re: Eight things you might not know about light benj <nobodyxx@gmail> - 2016-04-20 22:01 -0400
Re: Eight things you might not know about light Odd Bodkin <bodkinodd@gmail.com> - 2016-04-21 08:51 -0500
Re: Eight things you might not know about light benj <nobodyxx@gmail> - 2016-04-21 12:07 -0400
Re: Eight things you might not know about light Odd Bodkin <bodkinodd@gmail.com> - 2016-04-21 11:34 -0500
Re: Eight things you might not know about light benj <nobodyxx@gmail> - 2016-04-21 22:07 -0400
Re: Eight things you might not know about light Odd Bodkin <bodkinodd@gmail.com> - 2016-04-22 07:42 -0500
Re: Eight things you might not know about light Sergio <invalid@invalid.com> - 2016-04-21 11:33 -0500
Re: Eight things you might not know about light benj <nobodyxx@gmail> - 2016-04-21 21:45 -0400
Re: Eight things you might not know about light "Y.Porat" <y.y.porat@gmail.com> - 2016-04-20 01:43 -0700
Re: Eight things you might not know about light "reber g=emc^2" <herbertglazier0@gmail.com> - 2016-04-19 12:24 -0700
Re: Eight things you might not know about light "reber g=emc^2" <herbertglazier0@gmail.com> - 2016-04-19 15:32 -0700
Re: Eight things you might not know about light benj <nobodyxx@gmail> - 2016-04-19 23:31 -0400
Re: Eight things you might not know about light "nuny@bid.nes" <Alien8752@gmail.com> - 2016-04-19 17:08 -0700
Re: Eight things you might not know about light Sam Wormley <swormley1@gmail.com> - 2016-04-19 19:23 -0500
Re: Eight things you might not know about light benj <nobodyxx@gmail> - 2016-04-20 00:09 -0400
Re: Eight things you might not know about light "nuny@bid.nes" <Alien8752@gmail.com> - 2016-04-19 23:15 -0700
Re: Eight things you might not know about light Sylvia Else <sylvia@not.at.this.address> - 2016-04-20 12:07 +1000
Re: Eight things you might not know about light benj <nobodyxx@gmail> - 2016-04-20 00:14 -0400
Re: Eight things you might not know about light "Y.Porat" <y.y.porat@gmail.com> - 2016-04-20 06:38 -0700
Re: Eight things you might not know about light Sam Wormley <swormley1@gmail.com> - 2016-04-20 11:09 -0500
Re: Eight things you might not know about light benj <nobodyxx@gmail> - 2016-04-20 13:46 -0400
Re: Eight things you might not know about light Poutnik <poutnik4nntp@gmail.com> - 2016-04-20 20:07 +0200
Re: Eight things you might not know about light Sylvia Else <sylvia@not.at.this.address> - 2016-04-22 11:50 +1000
Re: Eight things you might not know about light benj <nobodyxx@gmail> - 2016-04-21 23:19 -0400
Re: Eight things you might not know about light "reber g=emc^2" <herbertglazier0@gmail.com> - 2016-04-21 09:19 -0700
Re: Eight things you might not know about light Sam Wormley <swormley1@gmail.com> - 2016-04-21 15:46 -0500
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