Recent content by SimonB

Hi This is probably very naive! What is wrong with the following The (momentum of light) = E/c so it is then possible to write this as (mass of light x speed of light) = E/c and thus ... E = mc^2 ... this came up after I read the following with my students...

I think I have now answered this (?) : http://www.physics.rutgers.edu/ugrad/labs/1lw.html

A conceptual problem for me anyway! In the standard texts a Huygens construction is used to explain the diffraction pattern from a single slit. However it is not used in the explanations for double (or multiple slits). What is the justification for this ... the double slit pattern should be...

Thanks, I will of couse be doing the usual stuff. I have talked to the student and his reasoning is as follows. We had watched a video clip for electron interference. It described how the interference pattern is destroyed when the electron is observed entering one or other slit. The...

Thamks atavistic ... however the student considered thick in the direction perpendicular to the screen, along the direction of motion

Hi A question that came up today that I do not know how to answer. We were discussing (High School) the double slit experiment and that electrons show interference patterns too. A student asked if the thickness of the double slit slide mattered. ie if the slits were a metre deep ... would...

Thank you, very clear (now!)

Hi I am reading a popular physics book. It discusses the test of Einsteins theory by Eddington at the eclipse. "The deviation of the light was double that predicted by Newton's physics" Why does classical physics predict any deviation of light by gravity, did light have a mass in...