Recent content by joe_andersen

The light from the person reflects off two different points on the mirror and enters your two eyes at slightly different angles, meaning your eyes see the person at a slightly different place (you can test this by closing one eye alternately). Your brain is smart enough to tell that this means...

you can get i(t) from the basic equations. then, integrate the heat dissipated in the resistor (that's what they mean by internal energy, if I understand correctly) - which depends upon the current - from time zero to time infinity. This should end up being equal to the energy stored in a fully...

I agree - this is almost certainly persistence of vision - there is no physics reason why this could occur that I can think of. the effect is like the clocks I sometimes see advertised where a single line of leds waves back and forth,. showing the time. Joe Andersen Your Guide to...