25.1 Principle of Relativity
Michelson Interferometer

 

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Explanation:
The video simulates the Michelson Interferometer as discussed in Section 25.1. Referring to the diagram in Figure 25.2, the fixed mirror is on the left; the adjustable mirror is at the bottom next to the spinning wheel; the half-silvered mirror and the path-length compensator are in the middle; the light source is on the right; and the resulting interference pattern is shown at top right. The changes in pattern are due to the motion of the adjustable mirror. 
 
Source:
Samantha Shoemake and John T. Foley
The Optics Project (TOP)
Department of Physics and Astronomy
Mississippi State University, Mississippi State, Mississippi 39762.