Michelson Interferometer, circle fringes

In summary, a Michelson Interferometer is a scientific instrument that uses a beam splitter, two mirrors, and a detector to measure small changes in distance. It works by splitting a beam of light into two and then recombining them to create a pattern of interference called circle fringes. These circle fringes are used to measure changes in distance with high precision. This instrument has various applications in physics and engineering, such as measuring the speed of light, detecting gravitational waves, and testing material stability. It can measure distances with incredible accuracy, up to a fraction of a wavelength of light, making it a valuable tool for scientific research.
  • #1
Gab
2
0
Hello guys!

Lets say we have a laser beam and we send it to a michelson interferometer.
Why the beam pattern at the screen gives circles and not lines or something else?

Thanks

P.S.
see for instance
http://techtv.mit.edu/collections/physicsdemos/videos/9823-michelson-interferometer
 
Last edited by a moderator:
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  • #2
If the beam is not well-collimated, you will get fringes similar to what is displayed.
 

FAQ: Michelson Interferometer, circle fringes

What is a Michelson Interferometer?

A Michelson Interferometer is a scientific instrument used to measure small changes in distance, such as the wavelength of light. It consists of a beam splitter, two mirrors, and a detector.

How does a Michelson Interferometer work?

The beam splitter divides a single beam of light into two beams, which travel along different paths and are reflected by the mirrors. When the beams are recombined, they create a pattern of interference, known as circle fringes, which can be measured by the detector.

What are circle fringes?

Circle fringes are the pattern of light and dark rings that occur when two beams of light interfere with each other. They are used in Michelson Interferometers to measure changes in distance with high precision.

What are the applications of a Michelson Interferometer?

A Michelson Interferometer has various applications in physics and engineering, including measuring the speed of light, detecting gravitational waves, and testing the stability of materials.

How accurate is a Michelson Interferometer?

A Michelson Interferometer can measure distances with incredible precision, up to a fraction of a wavelength of light. This makes it a valuable tool for scientific research and experimentation.

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