product information
Speed of light High-tech in a didactic form ˂W
Detektor
Reflektor
Laser
˂s
Speed of light c0 = 299 792 458 meter / second
Measuring the speed of light, as well as distances, with only one device all thanks to state-of-the-art digital measuring technology The speed of light meter as central device features a modulated laser. The laser beam is guided along the measuring path and back into the measuring instrument. The phase shift between the emitted signal and the received signal enables the speed of light to be determined with an accuracy of +/- 2%. All of the measurement quantities that are required for calculating the speed of light are displayed. If one places various transparent media, such as water, oil, synthetic resin, or acrylic glass into the beam path, the change in the speed of light can be measured. If one knows the speed of light, the unit can be used for measuring distances. An oscilloscope is not required for the experiment. The unit is, however, equipped with output sockets for the signals so that the measurement method can be demonstrated in an even more profound didactic manner with a simple two-channel oscilloscope.
physics
Features Quick set-up and minimum adjustment needed The speed of light can be measured with an accuracy of +/- 2 % Measurements can be performed with or without an oscilloscope Integrated display of all of the relevant measurement quantities (ƒ, ∆φ, ∆t, ∆x) Determination of the speed of light of liquids and solids Distance measurements can be performed with the same device
www.phywe.com
product information
Technical details Dimension (mm): Operating voltage
Phasendifferenz phase difference φ in °
250 200
194 x 140 x 130 12 V DC (power supply unit included, input: 100 … 240 V~, 50 … 60 Hz) 5 VA Wavelength 635 nm, laser class 2 (complies with the safety regulations for schools) 3-digit LED-Display, digit height 20 mm
Power consumption: Diode Laser:
150 100
c= λ· ƒ ƒ = 50,0 MHz λ = (2∆s/∆φ)·360
50
Display:
0 0
0,5
1
1,5
USB Port Retro reflector with a stem (included)
2
distance Weg s in m
“Speed of Light” equipment set (11226.88) Complete set for performing the experiment
Products Measurement equipment for the speed of light Measurement equipment for the speed of light with retro reflector and power supply
11226.99
Speed of light measuring instrument, complete set The set includes: Speed of light measuring instrument with a retroreflector and power supply unit Optical bench 1.8 m for the measuring the speed of light Measuring instrument holder for the optical bench 3 slide mounts Acrylic glass cylinder with a holder Tubular cell with a holder Speed of light measuring instrument – complete set for performing the experiment
11226.88
Oscilloscope Digital storage oscilloscope, 25 MHz, 2 channel, color display incl. 2 x BNC cable 75 cm Oscilloscope
11456.99
PHYWE Systeme GmbH & Co. KG
Robert-Bosch-Breite 10 D-37079 Göttingen
T. +49 (0) 551 604 - 0 F. +49 (0) 551 604 - 107
info@phywe.com www.phywe.com
Grand’Route 79 B-4610 Beyne-Heusay
T. +32 (0) 436 162 - 30 F. +32 (0) 436 162 - 48 + 49
liege@phywe.com www.phywe.com
Succursale belge
10/2009, Copyright by PHYWE Systeme GmbH & Co. KG, subjects to alteration, errors and omissions excepted. 00229-02