Re: Simple Physics Quiz
Thank you blueangel - nice quiz 
Havt a=to admit 8b was kind of a guess.
“Some alpha particles passed through the thin gold leaf and were scattered at an angle, this showed Rutherford that a nucleus has a positive charge.”
Why did the alpha particles passing through the thin gold leaf mean they have alpha particles have a postive charge?
Fiber optics - how is the angle of incidence of light controlled to > critical angle for total internal reflection to take place,