- ... touching1
- Avoid rubbing which
may result in charge separation of opposite sign (depending on the
proofball metal and type of insulator: ``triboelectric series'',
see exp #6 of Part II).
- ... fact:2
- The actual B at the maximum electron orbit is only
0.5% less. See
Price, ``Electron trajectory in an e/m experiment'',
Am. J. Phys. 55, 18, (1987)
- ...
brightness3
- CAUTION: a stationary intense spot may damage the screen
- ... silicon;4
- As one might
expect since silicon has valence 4, phosphorus valence 5,
and aluminum valence 3
- ...
caliper5
- In all the following be sure you are not looking through the hole at one
end of the jaws. It is advisable to cover the hole with masking tape.
- ...
objective.6
- Be sure no light enters the telescope
except through the slit jaws. (You
may need masking tape on the caliper jaws to prevent this from happening.)