Also, here’s the simulation of an eclipsing binary that I used (one to demonstrate the effect, and one to use in the practical) and the worksheet I gave my pupils when I did it with them. The worksheet is written for measuring the changing resistance, but I’ve also done it with a cell in the circuit, and measured the changing current, which drops during the eclipse, just as the light curve does, whearas the resistance increases, which may wrong-foot some pupils.
Richard
1310120323eclipsing binaries simulation.ppt
1310120339eclipsing binaries for experiment.ppt
1310120355detecting binary stars.doc