Pentagon RED

submitted by: kelemengabi

Liquid standing wave

Red-Green-Blue Tuneable Liquid Crystal Laser Devices and Displays

submitted by: icamvid

Harry J. Coles gives a talk at the LC2CAM conference about the properties of several generic families of symmetric and non-symmetric bimesogenic liquid crystal materials.

Galaxy-Quasar Associations: Is the Big Bang Bung?

submitted by: RayTomes
When we see a galaxy and a quasar near each other in the sky, it might be because they are really near each other, or it might be that they are far apart and just along the same line of sight. Tests performed by Alan Stockton (Astrophysical Journal 223:747-757, "The Nature of QSO Redshifts", 1978) on a sample of such pairs have shown that some galaxy-quasar pairs have the same redshift and so are accepted as being at the same distance. Other pairs with very different redshifts however have...