- #1

barcelonaboy

- 3

- 0

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 is nowhere near the given book value of e/m 1.7*10^11 Ckg^-1

I think that I'm doing something in the wrong units as I need to get the answer in C/kg^-1, but I can't see where I'm going wrong.

Any pointers owuld be much appreciated