Recent content by mars187

Are you saying that ##\vec{s} = (\sin(\theta)*\cos(\phi); \sin(\phi)*\sin(\theta); \cos(\theta))##? I agree, and that's what I used in the denominator (unknowingly). Instead of using the equation for ##d## that I showed, one could use the one that's in the following link...

Homework Statement There's a person on the ground in (0,0,0). An object comes from the sky and hits the ground at (a,b,0), but continues propagating, that is, it does not stop. I need to find the minimum distance between the person and the object. All we know is that the person is in (0,0,0)...