File:Mojave Green in the Black Rock Desert - Flickr - jurvetson.jpg
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Summary
[edit]DescriptionMojave Green in the Black Rock Desert - Flickr - jurvetson.jpg |
Mojave Green is the name of the Aerotech propellant. (click photo to enlarge) My Nike Smoke screamed into the night on a J500 motor, weather-cocking into the wind... but the LED light control electronics could not take the g’s, and so she went dark... somewhere overhead in the eerily silent night sky. We all looked up and listened. Someone said they heard the pop of the parachute, who knows where, and so the recovery would have to wait ‘til the morning. P.S. The neon green comes from barium ions excited in the plasma and dropping to their ground state, releasing photons of a precise wavelength. The ions come from metal chlorides: Barium Chloride (BaCl) for green, Copper Chloride (CuCl) for blue, or Strontium Chloride (SrCl) for red. These metal chlorides generally do not exist at room temperature or are too reactive to add as an additive, so precursors are mixed in, and they react during the burn to create the desired molecules. The Chlorine comes from the Ammonium Perchlorate oxidizer for free, and one need only add metal salts such as nitrates or carbonates to provide the metal atoms. In this case, Barium Nitrate is the additive that forms BaCl during the burn to emit a laser-like green in the flame. (propellant primer) |
Date | Taken on 6 August 2011, 20:36 |
Source | Mojave Green in the Black Rock Desert |
Author | Steve Jurvetson from Los Altos, USA |
Flickr tags InfoField | rocket , aeronaut , black , rock , desert , nevada , night , launch , green , mojave , propellant , neon , light , saber , ballistic , reentry |
Licensing
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This image was originally posted to Flickr by jurvetson at https://flickr.com/photos/44124348109@N01/6029604826. It was reviewed on 20 July 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
20 July 2020
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current | 02:46, 20 July 2020 | 3,744 × 5,616 (4.97 MB) | Red panda bot (talk | contribs) | In Flickr Explore: 2011-08-11 |
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Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | Canon |
---|---|
Camera model | Canon EOS 5D Mark II |
Exposure time | 11/1 sec (11) |
F-number | f/2.8 |
ISO speed rating | 400 |
Date and time of data generation | 20:36, 6 August 2011 |
Lens focal length | 35 mm |
JPEG file comment | AppleMark |
Orientation | Normal |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | QuickTime 7.6.6 |
File change date and time | 09:10, 10 August 2011 |
Y and C positioning | Co-sited |
Exposure Program | 9 |
Exif version | 2.2 |
Date and time of digitizing | 20:36, 6 August 2011 |
Meaning of each component |
|
APEX shutter speed | −2,147,483,648 |
APEX aperture | 3 |
APEX exposure bias | 0 |
Metering mode | Spot |
Flash | Flash did not fire, compulsory flash suppression |
DateTime subseconds | 17 |
DateTimeOriginal subseconds | 17 |
DateTimeDigitized subseconds | 17 |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 3,849.2117888965 |
Focal plane Y resolution | 3,908.1419624217 |
Focal plane resolution unit | inches |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Scene capture type | Standard |
GPS tag version | 2.2.0.0 |