File:BlackLightBulb4300ppx2.jpg
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Summary
DescriptionBlackLightBulb4300ppx2.jpg |
English: Four F40T12/BLB 48 inch 40 watt black light fluorescent tubes in a standard fluorescent ceiling fixture. These emit long-wave (UVA) ultraviolet light at around 365 nm. Large black light fixtures like these are often used in produce storage rooms to attract fruit flies to bug zappers. The purple glow that black light tubes emit is not the ultraviolet light itself, which is invisible, but the purple 404 nm mercury vapor spectral line which passes through the dark blue filter material on the tube. The color is not rendered completely correctly in this photo; the tube looks darker to the naked eye because of differences in response between the eye and the camera sensor. |
Date | |
Source | Own work |
Author | FASTILY (TALK) |
Licensing
I, the copyright holder of this work, hereby publish it under the following licenses:
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.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue |
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Items portrayed in this file
depicts
27 November 2010
image/jpeg
ff14e174aa3c7fd99f5e45a9d944694ec1d7a9c3
3,934,472 byte
3,240 pixel
4,320 pixel
File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 06:50, 18 December 2011 | 4,320 × 3,240 (3.75 MB) | Rotatebot | Bot: Image rotated by 270° (EXIF-Orientation set from 6 to 1, rotated 0°) |
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Metadata
This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.
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Camera manufacturer | SONY |
---|---|
Camera model | DSC-W370 |
Copyright holder | Copyright 2009 |
Exposure time | 1/5 sec (0.2) |
F-number | f/3.5 |
ISO speed rating | 800 |
Date and time of data generation | 20:53, 26 November 2010 |
Lens focal length | 6 mm |
Orientation | Normal |
Horizontal resolution | 96 dpi |
Vertical resolution | 96 dpi |
Software used | 1.2500 |
File change date and time | 20:53, 26 November 2010 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.21 |
Date and time of digitizing | 20:53, 26 November 2010 |
Meaning of each component |
|
Image compression mode | 1.9399734348502 |
Shutter speed | 2.322 |
APEX aperture | 3.696 |
Exposure bias | 0 |
Maximum land aperture | 3.696 APEX (f/3.6) |
Metering mode | Multi-Spot |
Light source | Unknown |
Flash | Flash did not fire |
Supported Flashpix version | 1 |
Color space | sRGB |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Scene type | A directly photographed image |
Exposure mode | Auto exposure |
White balance | Manual white balance |
Digital zoom ratio | 1 |
Focal length in 35 mm film | 44 mm |
Scene capture type | Standard |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
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