Physics 152 Lab - Setup Instructions: Static Hydrogen Spectrum

Physics 152 Setup Details:
The Hydrogen Spectrum
(click each image for a larger view)
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Room setup
Note how spectrometers are arranged near edge of bench

Stuff needed: gas tube power supply (with
H tube), mirror, Spectrometer with diffraction grating,
transformer with illuminated magnifying lens
Gas tube power supply, shown with
H tube. Black portion is elevated to match spectrometer height

New gratings & custom made brass base - 2019.
The label is on the grating side
Tools needed to tighten grating in holder:
Small crescent wrench, 3/32" allen wrench

Annotated version of the spectrometer.
This is an old photo - note the H-tube power supply at left!
Put grating in its base; place on stage
Note that the label (grating) side faces the H-tube!

The grating in its base on the stage.
The label faces the H-tube
Detail showing grating on stage

All spectrometers are labeled A through H. Place them on the benches
according to the map on the setup page. Spectrometers E and F are also
labeled 2008. Parts need to be matched for these two spectrometers
Match spectrometers E and F with the corresponding 2008-labeled
grating, grating holder & power supply. A variac is needed for the 2008
models, since the illuminated reticle is very bright

Transformer with illuminated magnifying lens
Plug transformer into side of spectrometer

Place boxes of parts on front bench.
Flashlights are left over from last week's lab

Box O'spectrometer parts. The gratings are
stored in the ugly green boxes (lower left)

Two lasers will be placed on the movable table.
Wood platforms elevate one laser so the patterns don't overlap
Lasers can't be too far away from the wall,
or they'll encounter interference from the tube power supply
or spectrometer

If 7 or fewer spectrometers are set up, then the laser can be
placed on the central portion of the lab bench

Return To Setup Instructions

Room setup	Note how spectrometers are arranged near edge of bench
Stuff needed: gas tube power supply (with H tube), mirror, Spectrometer with diffraction grating, transformer with illuminated magnifying lens	Gas tube power supply, shown with H tube. Black portion is elevated to match spectrometer height
New gratings & custom made brass base - 2019. The label is on the grating side	Tools needed to tighten grating in holder: Small crescent wrench, 3/32" allen wrench
Annotated version of the spectrometer. This is an old photo - note the H-tube power supply at left!	Put grating in its base; place on stage Note that the label (grating) side faces the H-tube!
The grating in its base on the stage. The label faces the H-tube	Detail showing grating on stage
All spectrometers are labeled A through H. Place them on the benches according to the map on the setup page. Spectrometers E and F are also labeled 2008. Parts need to be matched for these two spectrometers	Match spectrometers E and F with the corresponding 2008-labeled grating, grating holder & power supply. A variac is needed for the 2008 models, since the illuminated reticle is very bright
Transformer with illuminated magnifying lens	Plug transformer into side of spectrometer
Place boxes of parts on front bench. Flashlights are left over from last week's lab	Box O'spectrometer parts. The gratings are stored in the ugly green boxes (lower left)
Two lasers will be placed on the movable table. Wood platforms elevate one laser so the patterns don't overlap	Lasers can't be too far away from the wall, or they'll encounter interference from the tube power supply or spectrometer
If 7 or fewer spectrometers are set up, then the laser can be placed on the central portion of the lab bench


©Jeffrey R. Miller	St. Lawrence University	Department of Physics