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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Night Vision Scopes
From: Bill B
Date: 2005 Jul 11, 02:20 -0500
From: Bill B
Date: 2005 Jul 11, 02:20 -0500
> The obvious example is using a magnifying glass to burn holes in > the school desk on a sunny day... Which brings us back to refraction. Or vandalism. Can I focus a magnifying glass through an automotive windshield to burn holes in the dashboard of someone in my designated parking spot?Or as amateur photographers learn when they set their focal-plane-shutter SLR's back-side down on a nearly-horizontal surface when the Sun is high--without a lens cap; a swell way to burn a hole through the shutter curtain. Bill
