Organic laser breakthrough
Organic lasers are attractive for optical applications because they are inexpensive to manufacture, can be grown as thin films and have good temperature stability. Results from the Princeton team sugg...
Light gets in your eyes
To do this Levy adapted a technique used by solar astronomers in which a black disk is placed in the focal plane of the telescope. The size of the disk is chosen so that it exactly matches the SunR...
Perrin’s hypothesis reborn
In a unimolecular reaction a molecule breaks into two smaller molecules (or atoms) in a manner that appears to be independent of the chemical composition of its surrounding. The number of molecules fa...
Axis row rolls on
An old debate on the universe was reborn this month
