Search found 2 matches

by higgins2k
Wed Dec 25, 2013 11:31 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1308: "Christmas Lights"
Replies: 42
Views: 20305

Re: 1308: "Christmas Lights"

I think it's hydrogen. The hydrogen emission lines in your picture are in the ultraviolet, with wavelengths between 900 and 1300 Angstroms. Visible light is between 4000ish Angstroms (purple) and 7000ish (red). The emission peak we see in Mr. Munroe's fireplace is well into the infrared, somewhere ...
by higgins2k
Mon Sep 26, 2011 3:30 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0956: "Sharing"
Replies: 82
Views: 26717

Re: 0956: "Sharing"

The late Shel Silverstein has a new book out, Every Thing on It , with 145 previously unpublished poems and drawings. NPR's Morning Edition featured several poems read aloud by Mr. Silverstein's relatives and others. See http://www.npr.org/2011/09/20/140566486/shel-silversteins-poems-live-on-in-ever...

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