Download Michelson Interferometer-Physics-Lab Report and more Exercises Physics in PDF only on Docsity! MEASURING WAVELENGTH OF LIGHT THROUGH MICHELSON INTERFEROMETER Submitted to: Dr. Asloob Ahmad Mudassar Submitted by: Yasir Ali M.Phi. Physics DPAM PIEAS docsity.com Introduction:-. Laser light are assumed to be monochromatic light. They are not so monochromatic but its wavelength is spread over a small range and centered on a wavelength which is called wavelength of source. Wavelength is an important parameter of laser. Laser applications requires laser of specific wavelength. It is a well-established fact that different dental procedures require different laser wavelengths. Wavelength is important because specific body tissues interact in unique ways depending on the particular laser source. So laser wavelength is an important parameter. It is found mostly by Michelson Interferometer. Michelson interferometer:- Michelson Interferometer was introduced by Albert Michelson in 1881,is an instrument that brought the era of modern physics; most notably, it validated Einstein's theory of special relativity and dismissed the presence of ether through which light was thought to have propagated. The Michelson interferometer is a precision optical instrument that splits a beam of light and allows each beam to follow different optical paths of lengths, L1 and L2, and then to recombine (the light beams) by superimposing them so that they interfere. If the difference in the path lengths traveled by the two rays, L2- L1, is an integral number wavelength of the (monochromatic) light, then constructive interference occurs. If L2-L1 is equal to half a wavelength, then destructive interference occurs and no light is observed. A precision measurement of the path lengths L2 and L1 will allow a precision measurement of the wavelength of the monochromatic light used. Figure 1. Michelson interferometer Figure 1 shows the Michelson Interferometer. Light from the source passes through the beam splitter, divides the light along two paths. One part is transmitted to mirror M1 the other is reflected to mirror M2. These two rays reflect back to the beam splitter where they recombine and proceed toward the eyepiece where interference is observed. docsity.com
