00229_02_phy_lichtgeschwindigkeit
DESCRIPTION
Quick set-up and minimum adjustment needed Determination of the speed of light of liquids and solids 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. Integrated display of all of the relevant measurement quantities (ƒ, ∆φ, ∆t, ∆x) Detektor Reflektor c 0 = 299 792 458 meter / second s LaserTRANSCRIPT
Speed of light
c0 = 299 792 458 meter / second
Laser
Detektor Reflektor
s
www.phywe.comphysics
product information
Speed of lightHigh-tech in a didactic form
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.
FeaturesQuick 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
product information
PHYWE Systeme GmbH & Co. KG Robert-Bosch-Breite 10 D-37079 Göttingen
T. +49 (0) 551 604 - 0 F. +49 (0) 551 604 - 107
[email protected] www.phywe.com
10/2009, Copyright by PHYWE SystemeGmbH & Co. KG, subjects to alteration,errors and omissions excepted.
00229-02 Succursale belge Grand’Route 79
B-4610 Beyne-HeusayT. +32 (0) 436 162 - 30 F. +32 (0) 436 162 - 48 + 49
[email protected] www.phywe.com
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
Products
Technical details
0
50
100
150
200
250
0 0,5 1 1,5 2
Weg s in m
Phas
endif
fere
nz φ
in °
c= λ· ƒ ƒ = 50,0 MHz λ = (2∆s/∆φ)·360
Dimension (mm): 194 x 140 x 130
Operating voltage 12 V DC (power supply unit included,
input: 100 … 240 V~, 50 … 60 Hz)
Power consumption: 5 VA
Diode Laser: Wavelength 635 nm, laser class 2
(complies with the safety regulations
for schools)
Display: 3-digit LED-Display,
digit height 20 mm
USB PortRetro reflector with a stem (included)
“Speed of Light” equipment set (11226.88)
Complete set for perfor-
ming the experiment
phas
e dif
fere
nce
distance