How do you find the wavelength of sodium light using Michelson interferometer?
- To find out the difference in wavelength of D1 and D2 lines of sodium light. Wavelength separation λ1 – λ2 = λ2 / 2D
- To determine the wavelength of monochromatic light. The wavelength of laser is calculated by;
- To measure refractive index of transparent materials.
What does an interferometer measure?
Because of their wide application, interferometers come in a variety of shapes and sizes. They are used to measure everything from the smallest variations on the surface of a microscopic organism, to the structure of enormous expanses of gas and dust in the distant Universe, and now, to detect gravitational waves.
What is D Michelson interferometer?
Precise distance measurements can be made with the Michelson interferometer by moving the mirror and counting the interference fringes which move by a reference point. The distance d associated with m fringes is d = mλ/2 .
What is use of Michelson interferometer?
The Michelson interferometer and its modifications are used in the optical industry for testing lenses and prisms, for measuring index of refraction, and for examining minute details of surfaces (microtopographies). The instrument consists of a half-silvered mirror that divides a light beam into two equal parts,…
Which lens is used in Michelson interferometer?
In the lab, you will use a convex lens to disperse a laser light source. With a dispersed beam, the interferometer produces an interference pattern on the screen instead of a single point. Figure 3 shows the path of a dispersed laser beam at an exaggerated angle.
Why convex lens is used in Michelson interferometer?
In the lab, you will use a convex lens to disperse a laser light source. With a dispersed beam, the interferometer produces an interference pattern on the screen instead of a single point.
How do you measure the distance of a Michelson interferometer?
Precise Distance Measurements by Michelson Interferometer A red laser light of wavelength 630 nm is used in a Michelson interferometer. While keeping the mirror fixed, mirror is moved. The fringes are found to move past a fixed cross-hair in the viewer. Find the distance the mirror is moved for a single fringe to move past the reference line.
How to determine the wavelength of a laser using the Michelson?
To determine the wavelength of a laser using the Michelson interferometer. Laser light source, Michelson interferometer kit, optical bench, meter scale. Interferometers are used to precisely measure the wavelength of optical beams through the creation of interference patterns .
How are coherent beams obtained in the Michelson interferometer?
In the Michelson interferometer, coherent beams are obtained by splitting a beam of light that originates from a single source with a partially reflecting mirror called a beam splitter. The resulting reflected and transmitted waves are then re-directed by ordinary mirrors to a screen where they superimpose to create fringes.
What is the wavelength of light used in the movable mirror?
The light source used is a sodium lamp, wavelength 589 nm. By what distance did the movable mirror move? A Michelson interferometer is used to measure the wavelength of light put through it.