Various Experiments in Laser Interferometry

Ben GallupLab Partner: Mike Del Zio

3-13-20032.671 Instrumentation and Measurement

Dr. B. J. Hughey, Prof. D. Gossard, Prof. I. W. Hunter

General Setup

Apparatus Schematic

Index of Refraction Setup

Interference Theory• Constructive Interference

• Destructive Interference

+ =

+ =

Index of Refraction Data

Fit Slope = 3.4495

= n/n-1

ncalulated = 1.4802

naccepted = 1.51

%error = 6.62%

Thermal Expansion Setup

Thermal Expansion Data

Fit slope = 1.201e-6 m/oC

α = slope/L

L = 50.8e-3 m

αexperimental = 2.36e-5/oC

αaccepted = 2.40e-5/oC

%error = 1.67%

Laser Microphone Setup

Laser Microphone Data