Presentation about Roger Bacon (rainbows)

[AngularMomentum]

I need to give a presentation about roger bacon (the guy who said that rainbows form at a 42 degree angle). It's hard to find information about his study of rainbows so if anyone knows something about it I'll be grateful.

 

[Dr. Courtney]

This google search brings up lots of hits that look relevant

Roger Bacon Optics Rainbows 42 degrees

 

[AngularMomentum]

thank you

 

[berkeman]

Pretty amazing what a Google search can do...