File:BiodegradablePlasticUtensils1.jpg
Original file (2,700 × 1,757 pixels, file size: 559 KB, MIME type: image/jpeg)
Summary[edit]
| Summary | |
|---|---|
| Description | Knives, forks, and spoons made from a biodegradable starch-polyester material.
The photo has been realized using the photoelasticity method, an experimental method which gets a fairly accurate picture of stress distribution even around abrupt discontinuities in a material. When a ray of plane polarised light is passed through a photoelastic material, it gets resolved along the two principal stress directions and each of these components experiences different refractive indices. The difference in the refractive indices leads to a relative phase retardation between the two component waves. The setup used to photograph this photo was probably composed of: A regular light source, with a quarter-wave plate installed to polarize the emerging light A regular photo camera, with a quarter-wave plate installed in front of the lens Light and camera being installed and oriented in the same direction, the two quarter-wave plates were turned with the polarizing axis in the same direction. |
| Source | Wikimedia Commons file page |
| Author | Scott Bauer |
| Permission | See original Commons license details. |
Licensing[edit]
Public Domain
This file is in the public domain and may be used without restriction.
Please see the linked source page for the original file history, attribution information, and licensing details.
Original attribution and file history: Wikimedia Commons
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 03:33, 5 June 2026 | | 2,700 × 1,757 (559 KB) | Maintenance script (talk | contribs) | == Summary == Importing file |
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