From tonight, and ongoing every Friday night in June, a 10W green laser beam will be sent over Marseille historical center. This will redo Fizeau's experiment and measure the speed of light.
See the blog: un laser sur Marseile
Different animations will be distributed along the laser beam path. Posters to illustrate the concepts and applications of lasers, and demonstrations with lasers :
* mini laser show
* laser balloon burning
* schweppes fluorescence
* invisible ink seen with laser
* CD rom physics
Going back to basics, my first Micscape paper is thus devoted to an early student microscope stand of the second mid of the 19th century. Thanks to its open design, this microscope is ideal for demonstrations, and also for oblique epi-darkfield illumination to reveal physical colors from diatoms.