Question

How does e/m ratio was found for electron?​

Answer 1

• If the velocity of the electrons emerging from the gun is known e/m ratio.
• e/m ratio can be calculated from th given below equation:
• where q = e . ay = e m Ey . y = voyt + 1 2 at2
• The cathode ray is deflected away from the negatively-charged electric plate, and towards the positively-charged electric plate. The amount by which the ray was deflected by a magnetic field helped Thomson determine the mass-to-charge ratio of the particles.