3B Scientific Greenhouse Effect Kit (115 V, 50__60 Hz) - Manual (Page 4)

3B SCIENTIFIC® PHYSICS
1
Kit Greenhouse Effect U8460500
Instruction manual
10/07 JS
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1 Reflector filament lamp in
stem-mounted socket
2 Rod-mounted cuvette
3 Absorption chamber
4 Metal disc on stem
5 Base
rail
6 Support rods
7 Absorption chamber with
taps
1. Safety instructions
Fire risk: special care is needed when filling the
absorption chambers with flammable gases.
• Follow all fire protection regulations.
• Do not fill the absorption chambers close to
naked flames.
• After completion of the experiments, open the
taps, outside the building if possible, and flush
the added gas out of the absorption chamber
using the flexible tube provided.
2. Scope of delivery
1 Base plate, 450 mm x 70 mm
1 Lamp socket with mount
1 Incandescent reflector bulb, 60 W
1 Cuvette on mount
1 Black metal disc on mount
1 Absorption chamber
1 Absorption chamber with taps
2 Supporting rods for the absorption chambers
1 Roll of cellophane film
1 Silicone tube, 30 cm
1 Storage box
3. Description
The greenhouse effect kit can be used to demon-
strate the way that human activity exacerbates the
greenhouse effect in the earth’s atmosphere.
A reflector filament lamp generates visible light and
infrared radiation. The long-wavelength component
of this is partly absorbed when the beam is passed
through a water-filled cuvette, and the resulting
radiation then has proportions of visible light and
infra-red radiation that approximate closely to the
radiation from the sun. This radiation is passed
through an absorption chamber filled with either
air or a mixture of air with a greenhouse gas, after
which its intensity is measured by a Moll-type ther-
mopile. It is found that the absorption of solar ra-
diation is only slightly affected by adding a green-
house gas to air.
To generate infra-red radiation of very long wave-
lengths, the water-filled cuvette is replaced by a