Description
Purpose:
The device is intended to demonstrate experiments on optics and quantum physics.
Device configuration
1. Semiconductor laser and power supply
2. Gitter (150 strokes per mm)
3. Ruler with magnets
The experiments
1. Determining the laser wavelength
2. Determining the Planck’s constant
The concept of experiment is determining
the wavelength of semiconductor laser and
minimal voltage of barrier both,. The screen
is installed in (50-70) cm far from gitter.
To provide perpendicularity of screen and ray,
the units should be configured in
the board’s corner. A high diffraction order is observed if a gitter of small number of strokes is utilized.
The gitter must be installed perpendicularly to ray path. The optical set is adjusted by gitter
reflection or minimal distance between
diffraction orders. Voltage pulsing leads
to the decreasing the barrier voltage
registered. The results (using non-expensive
laser pointer): Wavelength, 670 mm
Lighting voltage, 1.8 V (both for crystal and
outlets with 1% mistake) Laser module taken
from the "Wave optics" demonstration set is
almost the same but its wavelength is 685 mm.
The possible reason is rather bad gitter
which has a mistake about 2% of number
of strokes due to 13 mm respectively. Dioes
stop lighting at 1.5 V voltage only. The
possibility of seeing a stain in darkness was
considered. Planck’s constant, 6.43*10-34 J*s Tabulated value, 6.62*10-34 J*s
To carry out the experiments you will need: Demonstrational meter
Additional information
Using in rooms: Physics

Head-quartered in Shenzhen, P. R. China, Labotrix Group Limited, one of the Worlddidac members, is a package solution provider & manufacturer of educational and laboratory equipment for subjects such as Physics, Chemistry, Biology, Geography, Mathematics, and PE, as well as school furniture, interactive electronic whiteboard, language lab, sensor-based products, etc.

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