https://physlab-wiki.com/ 2026-04-20T03:37:11+00:00 https://physlab-wiki.com/ https://physlab-wiki.com/lib/tpl/UChicago/images/favicon.ico text/html 2021-11-05T16:57:05+00:00 Anonymous (anonymous@undisclosed.example.com) https://physlab-wiki.com/physicsdemos/waves_and_optics/modern_optics/dynamic_light_scattering?rev=1636145825&do=diff Dynamic Light Scattering Red and green laser light scatters off of particles suspended in solution. The motion of interference fringes results from the Brownian motion of the particles. L0 PIRA DCS 4D10.14 text/html 2021-11-05T17:32:57+00:00 Anonymous (anonymous@undisclosed.example.com) https://physlab-wiki.com/physicsdemos/waves_and_optics/modern_optics/hologram_example?rev=1636147977&do=diff Hologram Example An example hologram is set up along with a bright light source for the class to see. L0 or L1 PIRA DCS 6Q10.10 text/html 2021-11-05T17:33:56+00:00 Anonymous (anonymous@undisclosed.example.com) https://physlab-wiki.com/physicsdemos/waves_and_optics/modern_optics/spatial_filtering?rev=1636148036&do=diff Spatial Filtering A laser is used to illuminate a grid pattern followed by a converging lens one focal length away. The result of this arrangement is the Fourier transform of the grid imaged at the plane one focal length downstream from the converging lens. A second lens may be used to image this plane and the original grid on a projection screen or wall as shown in the second and third images above. An adjustable slit placed at the Fourier transform plane can be used to filter spatial fr…