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Diffstat (limited to 'manual_source/chapters/emratio.tex')
| -rw-r--r-- | manual_source/chapters/emratio.tex | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/manual_source/chapters/emratio.tex b/manual_source/chapters/emratio.tex index cddd36a..e262b7e 100644 --- a/manual_source/chapters/emratio.tex +++ b/manual_source/chapters/emratio.tex @@ -144,7 +144,7 @@ $a=15$~cm. Each coil has $N=130$~turns. The magnetic field ($B$) produced by the coils is proportional to the current through the coils ($I_{hc}$) times $7.80\cdot10^{-4}$~tesla/ampere [$B (tesla) = (7.80 \cdot 10^{-4}) I_{hc}$]. A mirrored scale is attached to the back of the rear Helmholtz coil. It is -illuminated by lights that light automatically when the heater of the electron +illuminated automatically when the heater of the electron gun is powered. By lining the electron beam up with its image in the mirrored scale, you can measure the radius of the beam path without parallax error. The cloth hood can be placed over the top of the $e/m$ apparatus so the experiment |