When does a substance fluoresce?

Product No: P1417301

Principle

For carrying out this experiment the room should be rather dark, particularly for the part where the spectrum is viewed through the grating. It is important not to look directly from the front into the light cone. If you have a problem seeing a colour there is the further option of slightly increasing the distance between the fluorescent screen and the tube and viewing the colour of the light spot on the screen. In this case only that part is reflected which does not contribute to the fluorescence.

Task

Bei diesem Versuch wird die Anzahl der absorbierenden Schichten (Graufilter) verändert und die Lichtintensität gemessen. Als Ergebnis erarbeiten Sie in diesem Experiment eine Formel für die Abnahme der Intensität in Abhängigkeit der Schichtdicke, durch die das Licht geht. Anmerkung: Die Variation der Anzahl der Graufilter kann als Änderung der Dicke eines einzelnen Körpers aufgefasst werden.

 




Materiallist (Excerpt) Product Amount
Power supply 0...12 V DC/ 6 V, 12 V AC, 230 V 13505-93 1
Support base variable 02001-00 1
LED - UV, with series resistor and 4 mm plugs 09852-50 1
LED - red, with series resistor and 4 mm plugs 09852-20 1
LED - green, with series resistor and 4 mm plugs 09852-30 1
LED - blue, with series resistor and 4 mm plugs 09852-40 1
Stray light tube for LED, Di = 8 mm, l = 40 mm 09852-01 1
Support rod, stainless steel, l = 600 mm, d = 10 mm 02037-00 2
Slide mount without angle scale 09851-02 2
Grating, 500 lines/mm, in slide frame, glassless 09851-16 1
Diaphragm holder, attachable 11604-09 2
Plate, fluorescent, red 09851-19 1
Plate, fluorescent, yellow 09851-20 1
Plate, fluorescent, green 09851-21 1
Plate, fluorescent, blue 09851-22 1
Connecting cord, 32 A, 750 mm, red 07362-01 1
Connecting cord, 32 A, 750 mm, blue 07362-04 1

Literature for this article als follows

Title Product Language
interTESS DVD Physik, Optik / Atomphysik 01056-00
TESS advanced Physik Handbuch Optik / Atomphysik (Schülerversuche Sekundarstufe II) 13286-01 DEU
TESS advanced Physics manual Optics/Atomic Physics 13286-02 ENG

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Product No: P1417301

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