Department of Physics
226 Physics Building
825 West Dickson Street
University of Arkansas
Fayetteville, AR 72701
This early model of Michelson interferometer was used in the department for instructional
purposes. This interferometer demonstrates the wave nature of light and is generally
used in the instructional laboratories to measure the wavelength of light from a monochromatic
This spectrometer has a Pellin-Broca prism and was used for instructional purposes.
The knob rotates the prism which tunes the wavelength, which can be read on the spindle.
Close up image
A spherometer is used to measure radius of curvature of spherical surfaces such as
A xenon flashlamp similar to the one used by Theodore Maiman to demonstrate the laser
action in 1960. This the first demonstration of the laser action.The helical lamp
was 'wound' around a ruby crystal, which was the lasing medium.
Reproduced from Physics Today, October 1988.
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