Image:Falling ball.jpg
From Wikipedia, the free encyclopedia
Size of this preview: 142 × 477 pixels
Full resolution (819 × 2,751 pixels, file size: 363 KB, MIME type: image/jpeg)
 |
This is a file from the Wikimedia Commons. The description on its description page there is shown below. |
| Description |
An initially-stationary object which is allowed to fall freely under gravity drops a distance which is proportional to the square of the elapsed time. This image, spanning half a second, was captured with a stroboscopic flash at 20 flashes per second. During the first 1/20th of a second the ball drops one unit of distance (here, a unit is about 12 mm); by 2/20ths it has dropped at total of 4 units; by 3/20ths, 9 units and so on. To take the picture, the ball - about the size of a tennis ball - was suspended by a short length of black thread and was released as the shutter was opened and the flash triggered. The shutter remained open for the whole of the half-second period, during which time the flash fired multiple times to capture the ball at 1/20 second intervals. |
|---|---|
| Source |
Own photo |
| Date |
20 October 2007 |
| Author |
Self: Commons user MichaelMaggs |
| Permission ( Reusing this image) |
see below
|
 |
This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Dark background replaced with black; scale added; levels & contrast. |
Licensing
|
 |
This is a valued image on Wikimedia Commons. The image has been assessed under the valued image criteria and is considered the most valued image on Commons within the scope: Object in free fall.. You can see its nomination at Commons:Valued image candidates/Falling ball.jpg. |
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 13:31, 20 October 2007 | 819×2,751 (363 KB) | MichaelMaggs | ({{Information |Description=An initially-stationary object which is allowed to fall freely under gravity drops a distance which is proportional to the square of the elapsed time. This image, spanning half a second, was captured with a stroboscopic flash op) |
| 12:18, 20 October 2007 | 723×2,427 (284 KB) | MichaelMaggs | ({{Information |Description=An initially-stationary object which is allowed to fall freely under gravity drops a distance which is proportional to the square of the elapsed time. This image, spanning half a second, was captured with a stroboscopic flash op) |
File links
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 | Canon |
|---|---|
| Camera model | Canon EOS 20D |
| Exposure time | 3/5 sec (0.6) |
| F-number | f/3.2 |
| Date and time of data generation | 09:42, 20 October 2007 |
| Lens focal length | 23 mm |
| Orientation | Normal |
| Horizontal resolution | 240 dpi |
| Vertical resolution | 240 dpi |
| Software used | Adobe Photoshop CS2 Windows |
| File change date and time | 14:28, 20 October 2007 |
| Author | Michael N Maggs |
| Exposure Program | Manual |
| ISO speed rating | 200 |
| Exif version | 2.21 |
| Date and time of digitizing | 09:42, 20 October 2007 |
| Shutter speed | 0.736966 |
| Aperture | 3.356144 |
| Exposure bias | 0 |
| Maximum land aperture | 2.96875 |
| Metering mode | Pattern |
| Flash | 9 |
| Colour space | 65535 |
| Focal plane X resolution | 2886.3636363636 |
| Focal plane Y resolution | 2885.8057630736 |
| Focal plane resolution unit | inches |
| Custom image processing | Normal process |
| Exposure mode | Manual exposure |
| White balance | Auto white balance |
| Scene capture type | Standard |
