While at work I was on break time I took some blast sand out of the sand blaster and scattered it on the ground and I happened to look down and saw a bright bow around the head of my shadow. The bow is like a rainbow but the higher refractive index of glass made a bow with a radius of 28 degrees rather than 42 for a water drop rainbow. Look for these glass bead bows on reflective signs and freshly painted black top.
Sunday, May 14, 2006
Glass bead bow
While at work I was on break time I took some blast sand out of the sand blaster and scattered it on the ground and I happened to look down and saw a bright bow around the head of my shadow. The bow is like a rainbow but the higher refractive index of glass made a bow with a radius of 28 degrees rather than 42 for a water drop rainbow. Look for these glass bead bows on reflective signs and freshly painted black top.
Subscribe to:
Post Comments (Atom)
6 comments:
Nice bow Michael. The radius of glass bead bows is about 21 degrees, depending on the type of glass.
Michael, your work breaks are very productive. Nice shot.
21 degrees? I always thought it was 28 I need to revise that on my homepage. In some ways Les it reminds me of the road paint bow I got in the smokey MTNS in 2003 when new road edge lines were being painted
And Marko the productive work breaks I like the way you say that because during break time you can do that so long you got camera.
28° - Yes, for some reason that figure is also stuck in my mind. I just happened to be preparing the diagram for Gunther's seawater bow when I read yours and had to go away and double check!
Michael - I've mailed a little spreadsheet to compute rainbow angles. Glass of n~1.5 will be nearer 22-23 deg.
Yeah I got it but I don't have MS Spreadsheet I have MS word only
Post a Comment