1. Chapter 26: Electromagnetism

2. Mass of Particles
Magnetism is used to find the mass of very small charged particles
As a charged particle passes into a magnetic field, its course is altered (follows a circular path)
Thomson derived the following:

3. Detecting Small Particles
Cloud Chambers
Water vapor trapped inside
Water vapor condenses to liquid along path of radioactively decayed particles
Bubble Chambers
Fluid pushed to near boiling
Fluid boils as charged particles pass through it
Mass Spectrometer
Updated version of what Thomson used
Geiger Counter
Produces electric current from detected particles

4. Cloud
Chamber
Bubble
Chamber
Mass
Spectrometer
Geiger Counter

5. c = l n

6. Light—an EM Wave Light has an electric and magnetic component
All light can be affected by electric and magnetic fields
What are some things that produce EM fields?

7. Chapter 24-26: Review B4 Test Day
Pre-class for Thursday
What path does a charged particle follow when it enters a magnetic field?