Search found 2 matches

by bobpoblo
Tue Feb 10, 2009 10:43 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Unusual Light Pillars Over Latvia (2009 Jan 12)
Replies: 176
Views: 191233

Re: Unusual Light Pillars Over Latvia (2009 January 12)

Experiment: Perhaps the ambient light theory could be tested by blocking some of the light being emitted from the light pole. Specifically, by placing a shield on a horizontal plane around the top of the light pole. Imagine the tree in the picture below as the top of the light pole where the bulb is...
by bobpoblo
Fri Feb 06, 2009 2:26 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Unusual Light Pillars Over Latvia (2009 Jan 12)
Replies: 176
Views: 191233

Re: Unusual Light Pillars Over Latvia (2009 January 12)

I have not read through all the posts, but here is my theory on this. Because the ice crystals do not fall as fast as rain, they tend to float down to earth. As they float farther down toward the surface they should slow and build up enough in density to develop a layer that you can see (like many o...