and Marsden counted the deflections of alpha particles
off gold foil at different angles. Use the simulation
below to see their results!
diagrams show the overhead and side views of their apparatus.
Use the blue rotate buttons to rotate the microscope
to different angles, and the graph will count how many
particles are seen at this angle. The scale on the graph
can be changed using the slide bar.
more time looking at each angle to improve the accuracy
on the graph. Geiger and Marsden spent weeks counting
many thousands of particles.