From: nospam <nospam@nospam.invalid>
Subject: Re: People Keep Walking Into Glass at Apple Park
Full headers:
Path: news.netfront.net!goblin3!goblin2!goblin.stu.neva.ru!newsfeed.xs4all.nl!newsfeed7.news.xs4all.nl!feeder.erje.net!2.eu.feeder.erje.net!eternal-september.org!feeder.eternal-september.org!reader02.eternal-september.org!.POSTED!not-for-mail
From: nospam <nospam@nospam.invalid>
Newsgroups: rec.photo.digital
Subject: Re: People Keep Walking Into Glass at Apple Park
Date: Tue, 20 Feb 2018 12:43:45 -0500
Organization: A noiseless patient Spider
Lines: 11
Message-ID: <200220181243457729%nospam@nospam.invalid>
References: <p6gudf$bop$1@dont-email.me> <1a18a948-6a7f-465d-930d-1bb8f0d6bceb@googlegroups.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 8bit
Injection-Info: reader02.eternal-september.org; posting-host="5b61348d8314fbc41c82335865e77c2c";
logging-data="15532"; mail-complaints-to="abuse@eternal-september.org";posting-account="U2FsdGVkX18eL9fQXcVGdEtM0oqrDSzW"
User-Agent: Thoth/1.9.0 (Mac OS X)
Cancel-Lock: sha1:jRcjEQFx8w00Q0Mv1OEbLIeU5lY=
Print Article
Forward Article
In article<1a18a948-6a7f-465d-930d-1bb8f0d6bceb@googlegroups.com>,
RichA<rander3128@gmail.com> wrote:

> "Quite hard to see?"  Maybe if you're stoned all the time.  Glass reflects 4%
> at each surface (perpendicular rays) and a lot more at glancing angles. 
> Hard not to actually see it.

nowhere near 4%.

if that were the case, a camera lens with multiple surfaces would be
nearly opaque.