The hydrogen Lyman-alpha line is of utmost importance to many fields of astrophysics. This UV line being conveniently redshifted with distance to the visible and even near infrared wavelength ranges……続きを見る
Imagine that two people have been chosen to be observers in a scien tific experiment involving two photons, or quanta of light. These pho tons originate from a single source and travel in opposite d……続きを見る
