Re: The awesome physics behind how mirrors work

From	Sergio <invalid@invalid.com>
Newsgroups	sci.physics
Subject	Re: The awesome physics behind how mirrors work
Date	2016-05-29 16:33 -0500
Organization	Aioe.org NNTP Server
Message-ID	<nifn8j$esp$1@gioia.aioe.org> (permalink)
References	(4 earlier) <574b20f1$0$11941$c3e8da3$3a1a2348@news.astraweb.com> <nif8b4$1pg8$1@gioia.aioe.org> <A7KdnatIYr64tdbKnZ2dnUU7-UsAAAAA@giganews.com> <niffpc$434$1@gioia.aioe.org> <A7KdnapIYr5v1dbKnZ2dnUU7-UudnZ2d@giganews.com>

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On 5/29/2016 2:54 PM, Sam Wormley wrote:
> On 5/29/16 2:25 PM, Sergio wrote:
>> On 5/29/2016 12:34 PM, Sam Wormley wrote:
>>> On 5/29/16 12:18 PM, Sergio wrote:
>>>> Are there any mirrors made from non-conductive materials?
>>>
>>>   One can see one's reflection in a piece of glass.
>>>
>>>
>>>
>>
>> but the reflection is faint,
>> why are mirrors using metal so much better, brighter, than a reflection
>> via glass, plastic, or polished non-conductor ?
>>
>> (used to know this, forgot answer)
>
>
>   Are you thinking of Dielectric Coatings developed originally for
>   military optics used in hostile environments such as blowing desert
>   sand. There is no aluminum or other reflective metal used. The
>   reflective surface consists of multiple layers of thin film oxides,
>   similar to those used in anti-reflection coatings.
>
>   I have a dielectric mirror with reflectivity above 99% over the entire
>   4000 to 7000 Å photo-visual range. Dielectric coatings can result in
>   less scattered light.
>
>

it was from a course long ago, that showed the reflectivity of the 
surface depended upon induced surface currents, just one surface.

but a there are 3 parts, transmissivity, reflectivity, and absorptivity, 
and the metals do not absorb much so it gets reflected, non metals 
absorb more, the 1/4 oxide layers have good transmission.

the dielectric coatings are very interesting, I have a book "Optical 
Thin Films, Users Handbook" by James D Rancourt where multiple coatings 
are put on in near 1/4 wavelength, typically in stacks of alternating 
index (different materials ) but it is more on the optical interference 
filters that bandpass light through in a band. If the band is narrow, it 
reflects most all the light and looks very silver, like a mirror, on the 
back side, but a small notch is missing where the light was transmitted 
through the filter. Some of those filters have 10 layers..

Thread

The awesome physics behind how mirrors work Sam Wormley <swormley1@gmail.com> - 2016-05-28 18:37 -0500
  Re: The awesome physics behind how mirrors work Sergio <invalid@invalid.com> - 2016-05-28 19:17 -0500
    Re: The awesome physics behind how mirrors work benj <nobodyxx@gmail> - 2016-05-28 20:47 -0400
      Re: The awesome physics behind how mirrors work HVAC <mr.hvac@gmail.com> - 2016-05-29 06:57 -0700
        Re: The awesome physics behind how mirrors work benj <nobodyxx@gmail> - 2016-05-29 13:03 -0400
          Re: The awesome physics behind how mirrors work Sergio <invalid@invalid.com> - 2016-05-29 12:18 -0500
            Re: The awesome physics behind how mirrors work HVAC <mr.hvac@gmail.com> - 2016-05-29 10:31 -0700
              Re: The awesome physics behind how mirrors work Sergio <invalid@invalid.com> - 2016-05-29 14:16 -0500
              Re: The awesome physics behind how mirrors work benj <nobodyxx@gmail> - 2016-05-30 01:11 -0400
                Re: The awesome physics behind how mirrors work HVAC <mr.hvac@gmail.com> - 2016-05-30 01:15 -0700
                Re: The awesome physics behind how mirrors work benj <nobodyxx@gmail> - 2016-05-30 14:02 -0400
                Re: The awesome physics behind how mirrors work HVAC <mr.hvac@gmail.com> - 2016-05-30 11:19 -0700
                Re: The awesome physics behind how mirrors work benj <nobodyxx@gmail> - 2016-05-30 21:06 -0400
                Re: The awesome physics behind how mirrors work Sergio <invalid@invalid.com> - 2016-05-30 22:35 -0500
                Re: The awesome physics behind how mirrors work benj <nobodyxx@gmail> - 2016-05-31 00:24 -0400
                Re: The awesome physics behind how mirrors work HVAC <mr.hvac@gmail.com> - 2016-05-30 23:34 -0700
                Re: The awesome physics behind how mirrors work "nuny@bid.nes" <Alien8752@gmail.com> - 2016-05-31 01:48 -0700
                Re: The awesome physics behind how mirrors work HVAC <mr.hvac@gmail.com> - 2016-05-31 03:26 -0700
                Re: The awesome physics behind how mirrors work HVAC <mr.hvac@gmail.com> - 2016-05-31 06:21 -0700
                Re: The awesome physics behind how mirrors work benj <nobodyxx@gmail> - 2016-05-31 10:43 -0400
                Re: The awesome physics behind how mirrors work benj <nobodyxx@gmail> - 2016-05-31 10:41 -0400
                Re: The awesome physics behind how mirrors work HVAC <mr.hvac@gmail.com> - 2016-05-31 07:48 -0700
                Re: The awesome physics behind how mirrors work benj <nobodyxx@gmail> - 2016-05-31 12:08 -0400
                Re: The awesome physics behind how mirrors work "nuny@bid.nes" <Alien8752@gmail.com> - 2016-05-31 11:33 -0700
                Re: The awesome physics behind how mirrors work HVAC <mr.hvac@gmail.com> - 2016-05-31 17:48 -0700
                Re: The awesome physics behind how mirrors work "nuny@bid.nes" <Alien8752@gmail.com> - 2016-05-31 18:15 -0700
                Re: The awesome physics behind how mirrors work benj <nobodyxx@gmail> - 2016-06-01 02:55 -0400
                Re: The awesome physics behind how mirrors work benj <nobodyxx@gmail> - 2016-06-01 01:17 -0400
                Re: The awesome physics behind how mirrors work benj <nobodyxx@gmail> - 2016-05-31 10:59 -0400
                Re: The awesome physics behind how mirrors work Sergio <invalid@invalid.com> - 2016-05-31 13:07 -0500
                Re: The awesome physics behind how mirrors work "nuny@bid.nes" <Alien8752@gmail.com> - 2016-05-31 11:37 -0700
                Re: The awesome physics behind how mirrors work benj <nobodyxx@gmail> - 2016-06-01 00:17 -0400
                Re: The awesome physics behind how mirrors work benj <nobodyxx@gmail> - 2016-05-31 14:42 -0400
                Re: The awesome physics behind how mirrors work benj <nobodyxx@gmail> - 2016-05-31 10:40 -0400
                Re: The awesome physics behind how mirrors work Odd Bodkin <bodkinodd@gmail.com> - 2016-05-31 09:51 -0500
                Re: The awesome physics behind how mirrors work benj <nobodyxx@gmail> - 2016-05-31 12:24 -0400
            Re: The awesome physics behind how mirrors work Sam Wormley <swormley1@gmail.com> - 2016-05-29 12:34 -0500
              Re: The awesome physics behind how mirrors work Sergio <invalid@invalid.com> - 2016-05-29 14:25 -0500
                Re: The awesome physics behind how mirrors work Sam Wormley <swormley1@gmail.com> - 2016-05-29 14:54 -0500
                Re: The awesome physics behind how mirrors work jimp@specsol.spam.sux.com - 2016-05-29 21:17 +0000
                Re: The awesome physics behind how mirrors work Sergio <invalid@invalid.com> - 2016-05-29 16:33 -0500
                Re: The awesome physics behind how mirrors work benj <nobodyxx@gmail> - 2016-05-30 01:19 -0400
            how work with words start witm M noTthaTguY <abu.kuanysh05@gmail.com> - 2016-05-29 12:06 -0700
          Re: The awesome physics behind how mirrors work HVAC <mr.hvac@gmail.com> - 2016-05-29 10:26 -0700
            Re: The awesome physics behind how mirrors work benj <nobodyxx@gmail> - 2016-05-30 01:00 -0400
    Re: The awesome physics behind how mirrors work "nuny@bid.nes" <Alien8752@gmail.com> - 2016-05-29 12:41 -0700
      Re: The awesome physics behind how mirrors work jmfbahciv <See.above@aol.com> - 2016-05-30 12:18 +0000
        Re: The awesome physics behind how mirrors work HVAC <mr.hvac@gmail.com> - 2016-05-30 05:44 -0700
          Re: The awesome physics behind how mirrors work benj <nobodyxx@gmail> - 2016-05-30 14:25 -0400
            Re: The awesome physics behind how mirrors work "reber g=emc^2" <herbertglazier0@gmail.com> - 2016-05-30 15:42 -0700
              Re: The awesome physics behind how mirrors work benj <nobodyxx@gmail> - 2016-05-30 21:14 -0400
              Re: The awesome physics behind how mirrors work "reber g=emc^2" <herbertglazier0@gmail.com> - 2016-05-31 09:37 -0700
                Re: The awesome physics behind how mirrors work "hanson" <hanson@quick.net> - 2016-05-31 13:59 -0700
              Re: The awesome physics behind how mirrors work "reber g=emc^2" <herbertglazier0@gmail.com> - 2016-05-31 16:33 -0700
                Re: The awesome physics behind how mirrors work benj <nobodyxx@gmail> - 2016-06-01 01:41 -0400
                Re: The awesome physics behind how mirrors work ClutterFreak <ClutterFreak@FakeAddress.com> - 2016-06-01 10:46 -0500
                Re: The awesome physics behind how mirrors work "nuny@bid.nes" <Alien8752@gmail.com> - 2016-06-01 00:48 -0700
                Re: The awesome physics behind how mirrors work noTthaTguY <abu.kuanysh05@gmail.com> - 2016-06-01 09:59 -0700
      light is wavey ,period noTthaTguY <abu.kuanysh05@gmail.com> - 2016-05-31 10:24 -0700
  Re: The awesome physics behind how mirrors work benj <nobodyxx@gmail> - 2016-05-28 20:38 -0400
    Re: The awesome physics behind how mirrors work ClutterFreak <ClutterFreak@FakeAddress.com> - 2016-05-29 12:13 -0500
      Re: The awesome physics behind how mirrors work "hanson" <hanson@quick.net> - 2016-05-29 13:47 -0700
  Re: The awesome physics behind how mirrors work jimp@specsol.spam.sux.com - 2016-05-29 05:08 +0000
    Re: The awesome physics behind how mirrors work Sergio <invalid@invalid.com> - 2016-05-29 08:31 -0500
      Re: The awesome physics behind how mirrors work jimp@specsol.spam.sux.com - 2016-05-29 17:41 +0000
  Re: The awesome physics behind how mirrors work Sam Wormley <swormley1@gmail.com> - 2016-05-29 08:56 -0500
    Re: The awesome physics behind how mirrors work ClutterFreak <ClutterFreak@FakeAddress.com> - 2016-05-29 12:04 -0500
    Re: The awesome physics behind how mirrors work jimp@specsol.spam.sux.com - 2016-05-29 17:36 +0000
  Re: The awesome physics behind how mirrors work Sam Wormley <swormley1@gmail.com> - 2016-05-29 09:00 -0500
    Re: The awesome physics behind how mirrors work jimp@specsol.spam.sux.com - 2016-05-29 17:42 +0000

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