Michelson’s Interformeter

Michelson’s Interferometer

An interferometer is a device that can be used to measure lengths or changes in length with great accuracy by means of interference fringes. We describe the form  originally devised and built by A. A. Michelson in 188 I.Consider light that leaves point P on extended source S  in  and encounters beam splitter M. A beam splitter is a mirror that transmits half the incident light and reflects the other half. In the figure we have assumed, for convenience, that

Share This