Image:Plastic Protractor Polarized 05375.jpg

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[edit] Summary

Description
English: Tension lines in plastic protractor seen under cross polarized light. 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 birefringence of the plastic layer shows colored fringes. Also called Photoelasticimetry or photoelasticity.
Français : Lignes de tentions dans un rapporteur en plastique vue sous une lumière polarisée. Lorsque la lumière polarisée traverse un matériau sous tension, les deux composantes de l'onde subissent un retard l'une par rapport à l'autre. Ce retard fait apparaitre en lumière blanche des irisations dans le matériau. Ce phénomène, nommé Photoélasticité, est mesuré par Photoélasticimétrie.
Source
English: Own Photograph
Français : Mon oeuvre
Türkçe: Kendi çalışmam
Date

2004
Author

Nevit Dilmen
Permission
(Reusing this image)
I, the copyright holder of this work, hereby publish it under the following license:
GNU head Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation license, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation license".

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Date/TimeDimensionsUserComment
current10:54, 3 April 20082,048×1,536 (738 KB)Nevit ({{Information |Description=Tension lines in plastic protractor seen under polarized light. |Source=self-made |Date=2004 |Author= Nevit |Permission= |other_versions= }} Category:Nevit Dilmen Category:Protractors)
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Metadata

This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. If the file has been modified from its original state, some details may not fully reflect the modified file.

Camera manufacturer SONY
Camera model CYBERSHOT
Exposure time 1/80 sec (0.0125)
F-number f/2.8
Date and time of data generation 22:53, 25 May 2004
Lens focal length 9.7 mm
Orientation Normal
Horizontal resolution 72 dpi
Vertical resolution 72 dpi
Software used Adobe Photoshop CS2 Windows
File change date and time 03:58, 3 April 2008
Y and C positioning 2
Exposure Program Normal program
ISO speed rating 100
Exif version 2.1
Date and time of digitizing 22:53, 25 May 2004
Image compression mode 2
Maximum land aperture 2.0625
Metering mode Pattern
Light source Unknown
Flash 0
Color space sRGB