Explain how Michelson interferometer can be used to determine the wavelength of light?

To understand how a Michelson interferometer can be used to determine the wavelength of light, let's delve into the principles and setup of the interferometer and how it facilitates this measurement.

### Michelson Interferometer Basics

The Michelson interferometer is a classic optical instrument designed to create interference patterns using light waves. It consists of a beam splitter, two mirrors, and a detector (such as a screen or photodetector).

- **Beam Splitter:** Divides an incoming light beam into two parts.
- **Mirrors:** Reflect the divided beams back towards the beam splitter.
- **Detector:** Observes the interference pattern generated when the two beams recombine.

### Principle of Interference

When light is split into two paths by the beam splitter and then recombined after traveling different distances, interference occurs. This interference depends on the phase difference between the two beams, which is affected by the path difference (the difference in the optical path length traveled by _______ __________ ________ ______ ___ _________ _____ _____ __________.
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