Big Mouth Science : 無料・フリー素材/写真
Big Mouth Science / jurvetson
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
|---|---|
| 説明 | Inside the NASA wind tunnel... (more photos below) The outside of the test section is covered in acoustic insulation, and the inside with an anechoic material. The result is a very quiet environment that allows acoustic measurements. You clap in the test section and hear echos from further down the wind tunnel, but no echos from where you are standing. Here a short video of the peculiar effect... The ceiling of this 40 x 80 foot test section is festooned with retro-reflectors that reflect light back at the source from any angle. They also reflect a unique 2D barcode of dots to calibrate images taken from a known location. You only see them when shooting with a flash... Glad I brought two cameras. =) |
| 撮影日 | 2013-01-25 15:28:45 |
| 撮影者 | jurvetson , Los Altos, USA |
| タグ | |
| 撮影地 | |
| カメラ | Canon PowerShot S100 , Canon |
| 露出 | 0.017 sec (1/60) |
| 開放F値 | f/2.0 |
| 焦点距離 | 13651.87719 dpi |