File:Creative Commons - Some rights reserved.jpg
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This article is about the radiation unit. For the angular unit, see radian. rad Unit system CGS units Unit of Absorbed dose of ionizing radiation Symbol rad Conversions 1 rad in ... ... is equal to ... SI base units 0.01 J⋅kg−1 SI units 0.01 Gy CGS 100 erg/g
The rad is a unit of absorbed radiation dose, defined as 1 rad = 0.01 Gy = 0.01 J/kg. It was originally defined in CGS units in 1953 as the dose causing 100 ergs of energy to be absorbed by one gram of matter. The material absorbing the radiation can be human tissue or silicon microchips or any other medium (for example, air, water, lead shielding, etc.).
It has been replaced by the gray (Gy) in SI derived units, but is still used in the United States, although this is "strongly discouraged" in Chapter 5.2 of the Guide to the SI, which was written and published by the U.S. National Institute of Standards and Technology. dagowil5@gmail.com
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Summary
DescriptionCreative Commons - Some rights reserved.jpg |
English: Creative Commons - Some rights reserved |
Date | |
Source | https://www.flickr.com/photos/tylerstefanich/2117633427/ |
Author | TilarX |
Licensing
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16 December 2007
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 12:37, 16 April 2016 | 3,888 × 2,592 (3.94 MB) | Romaine | User created page with UploadWizard |
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Camera manufacturer | Canon |
---|---|
Camera model | Canon EOS DIGITAL REBEL XTi |
Exposure time | 1/100 sec (0.01) |
F Number | f/5.6 |
ISO speed rating | 200 |
Date and time of data generation | 22:38, 16 December 2007 |
Lens focal length | 50 mm |
Orientation | Normal |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Adobe Photoshop CS3 Macintosh |
File change date and time | 10:55, 17 December 2007 |
Y and C positioning | Co-sited |
Exposure Program | Aperture priority |
Exif version | 2.21 |
Date and time of digitizing | 22:38, 16 December 2007 |
Meaning of each component |
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APEX shutter speed | 6.6438598632812 |
APEX aperture | 4.9708557128906 |
APEX exposure bias | 0 |
Metering mode | Partial |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | Uncalibrated |
Focal plane X resolution | 4,433.2953249715 |
Focal plane Y resolution | 4,453.6082474227 |
Focal plane resolution unit | inches |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Scene capture type | Standard |
Supported Flashpix version | 1 |
Image width | 3,888 px |
Image height | 2,592 px |
Date metadata was last modified | 04:55, 17 December 2007 |
IIM version | 2 |