Delwedd:Falling ball.jpg
Maint y rhagolwg: 178 × 598 picsel. Eglurdebau eraill: 71 × 240 picsel | 143 × 480 picsel | 819 × 2,751 picsel.
Maint llawn ((819 × 2,751 picsel, maint y ffeil: 363 KB, ffurf MIME: image/jpeg))
Crynodeb
| Disgrifiad |
English: 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. Français :
Un objet en chute libre depuis une position fixe parcours une distance proportionnelle au carré du temps écoulé. Cette photo a été prise sur une période de 0,5 seconde avec un flash stroboscopique réglé sur 20 impulsions par seconde. La balle, de la taille d'une balle de tennis, était retenue pas un fil noir sectionne au moment ou l'exposition a commence et ou le flash produisit sa première impulsion lumineuse. Română: Un obiect staţionar lăsat în cădere liberă în câmpul gravitaţional al Pământului. Legea de mişcare este o funcţie de gradul al doilea, poziţia la fiecare moment fiind egală cu pătratul timpului scurs de la începutul căderii. Imaginea a fost expusă timp de 500 de milisecunde, cu un flash stroboscopic, declanşat cu o frecvenţă de 20 de flash-uri pe secundă. În primele 50 ms, mingea cade pe o unitate de distanţă (unitatea de distanţă este de aproximativ 12 mm—distanţa parcursă în 50 ms de un obiect lăsat liber în câmpul gravitaţional al Pământului de la o viteză iniţială de 0 m/s); după ce s-au scurs 100 ms, mingea a căzut 4 unităţi de distanţă; după 150 ms, mingea a parcurs 9 unităţi, şi aşa mai departe.
Pentru realizarea imaginii, mingea (de dimensiunile unei mingi de tenis) a fost suspendată cu un fir negru şi a fost lăsată să cadă în momentul începerii expunerii şi odată cu primul bliţ. Aparatul a continuat să expună timp de o jumătate de secundă, timp în care bliţul s-a declanşat de mai multe ori, luminând mingea la intervale de 50 ms |
| Dyddiad | |
| Ffynhonnell | Gwaith yr uwchlwythwr |
| Awdur | MichaelMaggs |
| Diwygiadau eraill |
|
 |
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.
|
Assessment
|
|
This 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 here. |
Trwyddedu
Yr wyf fi, deiliad yr hawlfraint ar y gwaith hwn, yn ei gyhoeddi yn ôl termau'r drwydded a ganlyn:
Trwyddedir y ffeil hon yn ôl termau'r drwydded Creative Commons Attribution-Share Alike 3.0 Unported.
- Mae'n rhydd i chi:
- rhannu – gallwch gopïo, dosbarthu a throsglwyddo'r gwaith
- ailwampio – gallwch addasu'r gwaith
- Ar yr amodau canlynol:
- cydnabyddiaeth – Mae'n rhaid i chi nodi manylion y gwaith hwn, rhoi dolen i'r drwydded, a nodi os y bu golygu arni, yn y modd a benwyd gan yr awdur neu'r trwyddedwr (ond heb awgrymu o gwbl eu bod yn eich cymeradwyo chi na'ch defnydd o'r gwaith).
- rhannu ar dermau tebyg – Os byddwch yn addasu'r gwaith hwn, neu yn ei drawsnewid, neu yn adeiladu arno, mae'n rhaid i chi ddosbarthu'r gwaith dan drwydded sy'n union yr un fath same a'r gwreiddiol.
Hanes y ffeil
Cliciwch ar ddyddiad / amser i weld y ffeil fel ag yr oedd bryd hynny.
| Dyddiad / Amser | Bawdlun | Hyd a lled | Defnyddiwr | Sylw | |
|---|---|---|---|---|---|
| cyfredol | 13:31, 20 Hydref 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 Hydref 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 |
Cysylltiadau'r ffeil
Mae'r 1 tudalennau a ddefnyddir isod yn cysylltu i'r ddelwedd hon:
Defnydd cydwici y ffeil
Mae'r wicis eraill hyn yn defnyddio'r ffeil hon:
- Y defnydd ar als.wikipedia.org
- Y defnydd ar ar.wikipedia.org
- Y defnydd ar ar.wikiversity.org
- Y defnydd ar ast.wikipedia.org
- Y defnydd ar bg.wikipedia.org
- Y defnydd ar bpy.wikipedia.org
- Y defnydd ar ca.wikipedia.org
- Y defnydd ar da.wikipedia.org
- Y defnydd ar de.wikipedia.org
- Y defnydd ar en.wikipedia.org
- Y defnydd ar es.wikipedia.org
- Y defnydd ar eu.wikipedia.org
- Y defnydd ar fr.wikipedia.org
- Y defnydd ar hr.wikipedia.org
- Y defnydd ar hy.wikipedia.org
- Y defnydd ar is.wikipedia.org
- Y defnydd ar it.wikipedia.org
- Y defnydd ar ja.wikibooks.org
- Y defnydd ar ko.wikipedia.org
- Y defnydd ar nl.wikipedia.org
- Y defnydd ar no.wikipedia.org
Gweld rhagor o'r defnydd cydwici o'r ffeil hon.
