Recent content by lmnt

oohhkay thanks for clarifying, and i attached a picture, but i don't really noe where that went...anways, it showed a hemisphere with rays coming at it from the right...like p·( <--- and point · p would be at the centre of the curve. So then, from what you're saying, the focus point...

Homework Statement Paralel light rays travel from air to a glass hemisphere with radius R and index of refraction n_{g}that is greater than n_{air}. A top view is shown in the attached image. (a) Where do the rays focus relative to the point P? (b) The index of refraction of the...

Thanks, that makes it clear, i thought i was simplifying it too much, so its good to know that I don't have to do the less simplified way with all the rigorous work.

The problem statement Icm=\frac{2}{5}mr2 \omega=v/r m=mass of object There's some things I don't really get about total angular momentum in a rigid body. Suppose a perfectly spherical object is rolling in uniform circular motion (ie. in a loop). Find the total angular momentum. Homework...