Search found 4 matches
- Thu Aug 06, 2009 6:32 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: A Triple Sunrise Over Gdansk Bay (2009 Aug 04)
- Replies: 338
- Views: 53613
Re: Cause of Triple Sunrise (APOD 2009 August 4)
The angle between a pair of internally reflected images is 1/3 the angle between the reflecting plates. My calculation was that the apparent angle between the images is twice the angle between the plates, not 1/3, but regardless, there have been enough photos posted through double pane windows to s...
- Thu Aug 06, 2009 1:20 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: A Triple Sunrise Over Gdansk Bay (2009 Aug 04)
- Replies: 338
- Views: 53613
Re: Cause of Triple Sunrise (APOD 2009 August 4)
Problems with the atmospheric phenomenon explanation: 1) An explanation is needed for the horizontal separation. 2) The vase foot on the suns is clearly duplicated. The separation of images is after that optical phenomenon. Problems with the multiple glass pane explanation: 1) The differential angle...
- Wed Aug 05, 2009 8:11 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: A Triple Sunrise Over Gdansk Bay (2009 Aug 04)
- Replies: 338
- Views: 53613
Re: Cause of Triple Sunrise (APOD 2009 August 4)
kamoses wrote: the only two possibilities for the window causing the reflections is 1) the window goes close left to far right, or 2) there is an incredibly large angle difference between the two panes, though I believe it would be so large that it would constitute two separate windows, and there w...
- Tue Feb 17, 2009 9:08 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Unusual Red Glow Over Minnesota (2009 Feb 17)
- Replies: 201
- Views: 47590
Re: Unusual Red Glow Over Minnesota (2009 February 17)
I'm a flight instructor in gliders and airplanes. I see a simple sunset-illuminated cloud, photographed from above. It doesn't look much like virga to me, as I would expect to see a denser rain-producing cloud above the virga. I have seen clouds dissipate before the rain/virga, leaving the virga beh...