PHGN-398A Fall
(→Measuring the wavelength of an unknown laser: What apparatus would you use to measure the wavelength of an unknown laser using a He-Ne laser whose wavelength is know to 8 significant figure?) |
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===Green Hat comments=== | ===Green Hat comments=== | ||
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| + | -measure the weight of the trucks carrying the material out of the quarry. | ||
| + | -measure the effect of mass loss on the gravitational attraction. | ||
| + | -measure the volume extracted and determine the mass from its density. | ||
| + | -measure the flow rate of material on a conveyor belt. | ||
| + | -use fuel consumption in the trucks to measure energy required to move the mass. | ||
| + | -measure the mass as it is loaded on the truck via a scale on the scooper truck. | ||
| + | -use Archimedes principle to measure displacement and therefore volume. Density gives mass. | ||
| + | - | ||
| + | |||
===White Hat comments=== | ===White Hat comments=== | ||
===Black Hat comments=== | ===Black Hat comments=== | ||
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Instructors: Vince Kuo, Patrick Kohl and Frank Kowalski
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Measuring the wavelength of an unknown laser: What apparatus would you use to measure the wavelength of an unknown laser using a He-Ne laser whose wavelength is know to 8 significant figures?
Green Hat comments
Apparatus:
-two slit interferometer -Superimpose the two laser beams with a beam splitter. Look at the time dependent detector output for beats and take a Fourier transform.
-Superimpose the two laser beams with a beam splitter then shine them on a grating. Look at the spatial separation.
-Superimpose the two laser beams in a Michelson interferometer. Then measure constructive interference of each color and compare.
-Superimpose the two beams and shine them into a parallel plate device (Fabrey-Perot) interferometer. Vary the plate spacing and compare the maxims observed.
-Shine the two beams in a "funnel" absorbing chamber and look for where each is extinguished.
-Cross the two beams at a known angle and look for the spacing of the fringes.
-Measure the combined color of the two beams together.
-Measure standing waves in a cavity whose size is changed.
-Use a dielectric material with a known index of refraction to measure cause a know phase shift and measure its effects.
-Look at the diffraction pattern as both beams traverse a single slit interferometer. -
White Hat comments
Black Hat comments
Yellow Hat comments
Red Hat comments
Blue Hat comments
Measuring the Mass Extracted from a Quarry
Green Hat comments
-measure the weight of the trucks carrying the material out of the quarry. -measure the effect of mass loss on the gravitational attraction. -measure the volume extracted and determine the mass from its density. -measure the flow rate of material on a conveyor belt. -use fuel consumption in the trucks to measure energy required to move the mass. -measure the mass as it is loaded on the truck via a scale on the scooper truck. -use Archimedes principle to measure displacement and therefore volume. Density gives mass. -
