As a follow up to
our first video, the Sagnac interferometer described
herein can detect rotation as low as 1 revolution every 7 hours. Uses
simple construction methods to keep the cost low.
Detecting earth's diurnal rotation using a large area Sagnac
describes the construction and testing of a Sagnac
interferometer / Fiber Optic Gyroscope (FOG) sensitive enough to detect
earth's rotation through space by detecting the speed of light
difference in the clockwise and counter-clockwise directions from the
perspective of the rotating observer. An article accompanying this
video is available here.
iFOG Sagnac fiber optic interferometer with wireless data collection
In the fourth
installment of our Sagnac series, we
show the implementation of a wireless Bluetooth data logging system to
collect the interferometer output data at various rotation rates and
import it into an Excel spreadsheet.
Fiber Optic Michelson
a fiber optic Michelson interferometer is tricky - here's how we did
A Fiber Optic Michelson Interferometer - first attempt
describes the construction of an all fiber optic Michelson
interferometer using Faraday rotator mirrors to overcome the
birefringence issues encountered with single mode fiber. Part 1 of 2.
An article further describing this work is available here.
Fiber Optic Michelson Interferometer Part 2: The Kennedy Thorndike
In this second
video we improve the fiber optic
Michelson interferometer by making it more compact and adding a
Bluetooth data logging system, as well as mounting it on a rotating
platform. This allows us to attempt a Kennedy Thorndike type
experiment, as well as a Shamir and Fox type experiment. The predicted
outcome based on Lorentz ether theory is discussed by way of our on
line simulators. An article accompanying this video is available here.
Optical Bench Construction
Low cost optical bench from scratch
Low cost optical
bench construction using a hand made aluminum
breadboard and optical mounts. Demonstrated with a Mach-Zehnder
Vacuum Tube Pump Down and
Pumping Down and Sealing a High Vacuum Tube
We describe the
construction of a vacuum system including a diffusion
pump for evacuating and sealing tubes to high vacuum (up to 1 E-6 Torr
). We demonstrate the process on an example vacuum tube, including
out-gassing with heat.
Optical Standing Wave Sensor
A simple Standing Wave Interferometer
This video shows
the construction of a simple standing wave
interferometer using a custom transparent CdS thin film sensor cast on
glass. Also uses piezo actuators to generate a repetitive AC signal as
the counter-propagating waves move through the sensor.
Two Laser Optical Interference
Interference between two independent laser beams
demonstrated between two independent, frequency-stabilized HeNe lasers.
Demonstrates that independent photons do in fact interfere, despite the
famous statement of Dirac to the contrary. More info here.
Levitation Motor with Eddy Current Drive Part 1.
A motor with a magnetically levitated rotor and
driven by eddy currents from a stator. Description and low speed run.
More info here.
Magnetic Levitation Motor with Eddy Current Drive Part 2
motor with a
magnetically levitated rotor and driven by eddy currents from a stator.
High speed run.
13. Home built Nuclear Magnetic Resonance ( NMR ) Spectrometer part 1
Home built 18 MHz
pulsed nuclear magnetic resonance spectrometer, showing the
transmitter, magnet, sample chamber, receiver, and a sample spin echo
from glycerol protons. More info here.
built Nuclear Magnetic Resonance ( NMR ) Spectrometer part 2 of 3
Home built 18 MHz
pulsed nuclear magnetic resonance spectrometer, showing the circuit
block diagram, magnet, and sample chamber, in more detail.
built Nuclear Magnetic Resonance ( NMR ) Spectrometer part 3 of 3
Home built 18 MHz
pulsed nuclear magnetic resonance spectrometer, showing the 90 and 180
degree pulses, the FID and spin echo signals from a glycerol sample.
More info under "Our
experiments and videos.''
16. Simple high
speed homopolar motor
A simple high speed homopolar motor using a screw, neodymium magnet,
brush, mounting and power supply.
Water Arc Launcher
Water arc explosion lifting a 17 gram weight
A water arc
launcher fires a 2 mL water slug after discharging 13 kilovolts through
it. Lifts a 17 gram object. More info under "Our
Magnet Motor Adams / Bedini Style
3D printed permanent magnet motor/generator using magnet reed switch
Shows our design
for a universal motor platform kit with both the rotor and stator
having 20 positions to place magnets and stator pieces such as coils
and reed switches. The current version is configured in the Adams /
Bedini style to demonstrate some of the reported effects with these