PHY290 Bergen The Speed Of Light Using The Foucault Method Lab Report

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lab report about the speed of light. it covers objective, theory, apparatus, procedure, data and analysis, discussion, conclusion, references.

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Bergen Community College
Physics II Lab

Speed of Light
PHY 290-005
Written By: Sait Bilal Cantas
Team Members: Bruce Le, Mikhaiel Myshkin
Date of Experiment:
Report submitted on:

The main objective of the experiment is to determine the speed of light using the Foucault

Figure 1: Foucault Method
Figure 1 shows the setup that will aid in determining the speed of light. When the equipment is
set properly, the optical path is as indicated. Lens L1 focuses the parallel beam of light emitted
by laser to point (point image). L2 is placed in such a way that beam image at s is reflected from
rotating mirror MR and is focused onto sphere-shaped mirror MF. The light is reflected by MF
along the same path to focus at s. A ray splitter is diagonally placed across the beam path so that
it reflects the image of returning light at point s´, the image cab be viewed through the
For the method to be used in determine the speed of light, it is crucial to understand the
relationship between the displacement of the image point and the speed of light. Other variables
affecting displacement during the experiment setup include

Rotation rate of rotating mirror MR

Distance between fixed mirror MF and rotating mirror MR

Magnification of L2, whic...

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