Arago spot, 2 of 2

Arago spot, 2 of 2

C009/4534 Rights Managed

Request low-res file

530 pixels on longest edge, unwatermarked

Request/Download high-res file

Uncompressed file size: 48.8MB

Downloadable file size: 6.7MB

Price image Pricing

Please login to use the price calculator

This image is part of the sequence science and technology: examples of the Arago spot



Caption: Arago spot, Photo 2 of 2..A steel ball is placed in a beam produced by either a Helium-Neon laser operating at 632.8 nm (red, Photo 1) or a Helium-Neon laser operating at 543.4 nm (green, Photo 2). The resulting diffraction patterns are observed at the same distance from the ball. Note that the fringe spacing is smaller for the green laser. Also note the bright spot, called Arago or Poisson spot, at the center of the geometric shadow. Historically, observation of Arago spot was used as an evidence for the wave theory of light.

Release details: Model release not required. Property release not available.

Keywords: arago, ball, beam, circular, demonstration, diffract, diffraction, education, educational, effect, experiment, fresnel, fringe, green, he, helium, interference, laser, light, monochromatic, ne, neon, optical, optics, phenomenon, physics, poisson, red, round, science, spot, visible

Licence fees: A licence fee will be charged for any media (low or high resolution) used in your project.