Hi Haths,
I'm plotting a graph of Voltage (V) against Current (mA) (V/mA) as part of an electron beam experiment, which is giving a gradient of 0.848 with the R^2 coming out as 0.9991 which is a good fit for the data points, so I'm confident in the graph and the data points.
The equation that...
I'm trying to calculate the ratio of e/m, I've plotted the given data points to get a straight line graph with a gradient of 0.848.
I know that the ratio of e/m is given by e/m = (4.49*10^8 * gradient^2)/volts
where volts = 3000.
When I plug the numbers in I get a value of 107625 which...