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- Tue Jan 13, 2009 12:37 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Unusual Light Pillars Over Latvia (2009 Jan 12)
- Replies: 176
- Views: 185576
Re: Unusual Light Pillars Over Latvia (2009 January 12)
Upon closer inspection, the "pillars" not only flare out in the upper region of the photo, but also the light appears to travel in the pattern of a vertical wave, resembling the equal-division of a freely-vibrating string (harmonic ratios). Could the fact that heat rises (from the lights) ...