Maybe a spectrophotometer. If you point it up towards a blue sky maybe the rainbow isnt full spectrum and the second one is full spectrum?
On Thu, 7 Mar 2019, 19:55 Bulent Celasun, <bulent.cela...@gmail.com> wrote: > I've found this tubular thing (9 - 22 cm in length, about 2 cm in > diameter) in a thrift store. > > There is a single lens in each end. > > It has moveable parts like a mirror that rotates 360 degrees around > the tube. During part of this travel it faces an oval hole on tube's > wall where one can see a tiny prism inside which can intersect the > tubular axis by moving a lever from outside. > > Directing the gadget toward a light source and looking at from the > less populated end of the "tube" I see a typical rainbow. (Light > travelling from one end to the other crossing the prism inside). > > Moving the lever properly while light reflecting from the mirror > enters inside (and is reflected to cross the prism) makes two adjacent > rainbows visible at the far end of the tube. > > Oh well! I am not sure if I was able to describe it... > > Anyway, I ask just out of curiosty. > Has anyone ever seen something like this? > > https://www.flickr.com/photos/bc_the_path/sets/72157707409395914 > > Bulent > --------------------------------------------------------------------- > http://patoloji.gen.tr > http://celasun.wordpress.com/ > http://www.flickr.com/photos/bc_the_path/ > http://photo.net/photodb/user?user_id=2226822 > http://www.pentaxphotogallery.com/artists/bulentcelasun > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and > follow the directions. > -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
