Monthly Archives: October 2018

Optical Tweezers

John F. Lindner October 21, 2018 11:22 AM

A focused light beam can trap a small particle, such as a micron-sized latex sphere (or biological cell). If the sphere is much larger than the light’s wavelength, ray optics suffices to explain the trapping. Light bends as it passes … Continue reading →

Posted in Physics | Leave a comment

Dr. Rendezvous

John F. Lindner October 9, 2018 1:23 PM

Edwin Aldrin earned his PhD from MIT in 1963 with a thesis titled, “Line-of-sight guidance techniques for manned orbital rendezvous”. Just three years later in 1966, Aldrin was the pilot of Gemini XII, the last flight of the Gemini program, … Continue reading →

Posted in Physics, Space Exploration | Leave a comment