There are two parts to the question.
A)Why is gravity not important during JJ Thomsons experiment?
b)what is the deflection due to gravity?
In a thomson spectromoter set at 10^4 (V/m). deflection with out the magnetic field applied equals .10 radians over a L of .050 m.
Speed of electron with magnetic field applied is 2.9x10^7 m/s.
Strength of Magnetic field is 3.4x10^-4 T.
I don't know what they are....
The Attempt at a Solution
A) in the experiment the effects of gravity were negated by the application of a magnetic field perpendicular to that of the electric field, to help over come any deflection caused by gravity.
B) I really don't know how to go about this.
I thought about it a little more...would I just be using the velocity, time distance and deflection angle to solve this??
Like...a particle fired at a zero degree angle?