What is Photo: Definition and 505 Discussions

A photograph (also known as a photo) is an image created by light falling on a photosensitive surface, usually photographic film or an electronic image sensor, such as a CCD or a CMOS chip. Most photographs are created using a smartphone/camera, which uses a lens to focus the scene's visible wavelengths of light into a reproduction of what the human eye would see. The process and practice of creating such images is called photography.

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  1. matthyaouw

    VOTE PF PHOTO CONTEST - Stand back, I'm going to try Science

    Vote for the best science-themed picture. 1. Matthyaouw 2. ZapperZ 3.Lisab http://img374.imageshack.us/img374/5706/ijoisten3.jpg 4. Marzena 5. Glondor 6. Larkspur 7. Integral 8. Andre View the contest thread to read the science connection for each picture.
  2. matthyaouw

    PF PHOTO CONTEST - Stand back, I'm going to try SCIENCE (Nov 22-29)

    Stand back, I'm going to try SCIENCE! Science-related pictures please. I know there's been a similar theme before, but as a science forum, I think we should be able to muster up some more science pictures. Please add a description with your photo, just so that we know what we're seeing...
  3. matthyaouw

    VOTE PF photo contest- Brought to you by the number 3

    Plenty of entries again this week. Please vote for your fave. 1. Edward http://img291.imageshack.us/img291/2136/029974r288gi2.jpg 2. Brewnog 3. Marzena 4. Glondor 5. Larkspur 6. ZapperZ 7. Andre 8. Neutrino 9. Hypatia...
  4. matthyaouw

    PF PHOTO CONTEST - Brought to you by the number 3 (Nov 15-22)

    This week's contest is brought to you by the number 3! The theme here is the number 3! Interpret that as creatively as you like Contest Rules: 1. Any digital photo or digitally-scanned photo relevant to the theme will be accepted within the contest period. In case there's a gray area...
  5. matthyaouw

    Vote- PF photo contest - Autumn/fall

    A good selection of entries this week. Vote for your favorite! 1. Turbo-1 2. Edward http://img513.imageshack.us/img513/6268/1000819jpgmoon2jc2.jpg 3. Hypatia 4. Mororvia http://img126.imageshack.us/img126/6619/res01290eo3.jpg 5. Waht...
  6. matthyaouw

    Photo Contest - Autumn/Fall (Nov 8-15)

    Autumn (Fall) For my first week of running the contest I thought I'd take a broad theme. Anything you relate to the season of Autumn (Fall, for you yanks) qualifies. It can be something obvious, or if you like some more personal association of yours. If it's not obvious, explain :smile...
  7. Borek

    Which Photo Will Win the VOTE Photo Contest?

    Not many, but interesting variety of takes on the subject. 1. Andre 2. turbo-1 3. ZapperZ 4. hypatia 5. NeoDevin http://img205.imageshack.us/img205/3897/1000594yp2.jpg 6. Borek Contest thread.
  8. physics girl phd

    News Polling place photo project

    The New York Times is collecting polling place photos from the 2008 presidential election. http://pollingplaces.nytimes.com/ Think it would be possible for us to do the same? Special Notes: "Photography of polling places is governed by state and local law — there is no one answer for...
  9. ZapperZ

    VOTE Photo Contest - This is Halloween

    A large variety of pictures to choose from with our Halloween theme this time. 1. larkspur 2. Borek 3. ZapperZ 4. Andre 5. hypatia 6. Integral 7. scorpa 8. turbo-1 9. edward http://img171.imageshack.us/img171/4242/1000899ox5.jpg 10. glondor...
  10. Borek

    PF PHOTO CONTEST - Smile (11/01 - 11/08)

    Smile! Those following photography thread know that it is not my idea, but this is week of substitutions - I am substituting for matthyaouw, and I will substitute Andre's contest theme for mine :smile: You are free to interpret the topic any way you want. But it must be obvious where the...
  11. ZapperZ

    Retirement of PF Photo Contest Organizer

    As most of you know, I started the PF Photo Contest in May of 2006. I think it has become quite a fun activity here in the GD forum. However, it is time for me to "retire" from running the contest and let someone else takes over. This will be effective on Nov. 1st, 2008. I will still be running...
  12. ZapperZ

    PF PHOTO CONTEST - This Is Halloween (10/25-10/31)

    This Is Halloween! This week's contest involves pictures related to Halloween. Zz. Contest Rules: 1. Any digital photo or digitally-scanned photo relevant to the theme will be accepted within the contest period. In case there's a gray area, or you're not sure if the picture is...
  13. ZapperZ

    VOTE Photo Contest - Are We Having Fun Yet?

    A smaller number of photos than last week, but still a good collection. This week's theme is "Are We Having Fun Yet?" Participants are free to interpret this anyway they like, but there has to be a clear connection between the theme and the photo. It is up to you to decide if the theme is...
  14. ZapperZ

    PF PHOTO CONTEST - Are We Having Fun Yet? (10/17 - 10/24)

    Are We Having Fun Yet? You are free to interpret the topic anyway you want. However, it has to be quite obvious how the topic is being portrayed in your photo. Zz. Contest Rules: 1. Any digital photo or digitally-scanned photo relevant to the theme will be accepted within the contest period...
  15. ZapperZ

    VOTE Photo Contest - Well-Beaten Path

    Our voting commences earlier this time in case the server upgrade starts early tomorrow. Please vote for the best picture that represents our theme, which is on a well-beaten walking path. 1. glondor 2. hypatia 3. scorpa 4. edward...
  16. ZapperZ

    PF PHOTO CONTEST - Well-Beaten Path (10/11-10/17)

    Well-Beaten Path This week, the pictures must show a walking path that is well-used. Zz. Contest Rules: 1. Any digital photo or digitally-scanned photo relevant to the theme will be accepted within the contest period. In case there's a gray area, or you're not sure if the picture is...
  17. ZapperZ

    VOTE Photo Contest - Life Is A Stage

    A smaller number of entries this week, which is expected considering the difficult nature of the theme. This week, the theme is on live performance by performing artists. Please vote for the picture that best represents our theme. 1. Integral 2. turbo-1 3. ZapperZ 4. Marzena...
  18. ZapperZ

    PF PHOTO CONTEST - Life Is A Stage (10/4-10/10)

    Life Is A Stage This week, the theme is on performers. Your picture must have, as its main subject, performing artists. This can be musicians, actors, dancers, etc. performing for the public or an audience. Please note that if the photo came from a performance where the taking of...
  19. ZapperZ

    VOTE Photo Contest - Seeing Red

    We have a lot of entries this week, and they are all terrific. So this is going to be another difficult one to vote on. Please vote for the best picture that represents our theme. Members were asked to submit a photo in which the color red is the main subject of the photo. You should judge if...
  20. ZapperZ

    PF PHOTO CONTEST - Seeing Red (9/27-10/3)

    Seeing Red For this week's contest, your photos must have the color red as the prominent color. The object in red must be the main subject of your picture. Zz. Contest Rules: 1. Any digital photo or digitally-scanned photo relevant to the theme will be accepted within the contest period. In...
  21. ZapperZ

    VOTE Photo Contest - Going 'Round And 'Round

    This contest should be interesting with many different interpretation of the theme. Please vote for the picture that best represents our theme this week, which is on something that goes around and around. 1. Andre 2. ZapperZ http://img140.imageshack.us/img140/7073/img1653oh6.jpg 3...
  22. ZapperZ

    PF PHOTO CONTEST - Going 'Round In Circles (9/20-9/26)

    Going 'Round In Circles This week, your photos must be on things that goes 'round and 'round in circles. Zz. Contest Rules: 1. Any digital photo or digitally-scanned photo relevant to the theme will be accepted within the contest period. In case there's a gray area, or you're not...
  23. ZapperZ

    VOTE Photo Contest - The Tree Of Life

    This promises to be a difficult contest to vote on since there are so many wonderful pictures. Still, please pick the picture that best represents our theme, which is on trees. Note that the participants were asked to submit a photo that has the tree/s as THE main subject, and not the scenery...
  24. ZapperZ

    PF PHOTO CONTEST - The Tree Of Life (9/13-9/19)

    The Tree Of Life This one should be easy. Pictures this week must be on trees. Trees (or a tree) must be the main subject of your picture, not the background scenery, the people in front of it, or anything else. Please note that fake trees do not qualify. Zz. Contest Rules: 1. Any...
  25. ZapperZ

    VOTE Photo Contest - Singing In The Rain

    This week's theme is both difficult and simple. The difficulty is to get a good shot that clearly shows the rain. The simple thing is that you simply have to vote for the picture that clearly shows the rain! :) 1. edward http://img181.imageshack.us/img181/9030/1000308ox8.jpg 2. Chi Meson...
  26. ZapperZ

    PF PHOTO CONTEST - Singing In The Rain (9/6-9/12)

    Singing In The Rain This week, your pictures must show a rainy scene. It must be clear enough that one can tell that it is raining. Zz. Contest Rules: 1. Any digital photo or digitally-scanned photo relevant to the theme will be accepted within the contest period. In case there's a...
  27. ZapperZ

    VOTE Photo Contest - Numerology

    Please vote for the picture that best represents our theme - Numbers. 1. Mororvia http://img380.imageshack.us/img380/1756/265tz8.jpg 2. larkspur 3. Moonbear 4. JasonRox http://img360.imageshack.us/img360/3991/img0234vy6.jpg 5. ZapperZ 6. Borek 7. edward...
  28. ZapperZ

    PF PHOTO CONTEST - Numerology (8/30-9/5)

    Numerology Play by the numbers! This week, your pictures must contain numbers, as in the Arabic numerals. These numbers must be clearly seen in your picture. Zz. Contest Rules: 1. Any digital photo or digitally-scanned photo relevant to the theme will be accepted within the contest...
  29. ZapperZ

    VOTE Photo Contest - With This Ring, I Thee Wed

    A rather small number of photos we have this week, but will it make choosing for which one to vote for any easier? Please vote for the picture that best represents our theme, which is a scene at a wedding. 1. hypatia 2. binzing 3. Andre...
  30. ZapperZ

    FINAL VOTE Photo Contest - From Dusk To Dawn

    This promises to be a very difficult final round. Please vote for the picture that best represents our theme - a scene during dusk or dawn. Good luck to everyone. 1. Chi Meson 2. binzing 3. robertm 4. ~christina~ http://img512.imageshack.us/img512/6127/editsunsetresevk7.jpg...
  31. ZapperZ

    PF PHOTO CONTEST - With This Ring, I Thee Wed (8/23-8/29)

    With This Ring, I Thee Wed This time, it is on weddings! Your picture must depict scenes at a wedding. This includes the scenes at the actual ceremony and the reception. Note that pictures on items related to a wedding without showing that they were taken at the wedding site is not...
  32. ZapperZ

    VOTE GROUP 2 Photo Contest - From Dusk To Dawn

    This the 2nd voting group for this contest. You have one vote to cast. 1. JasonRox http://img221.imageshack.us/img221/3594/dsc00079jc1.jpg 2. Mororvia http://img204.imageshack.us/img204/673/pfphoto1zg7.jpg 3. larkspur 4. matthyaouw 5. Andre 6. ZapperZ...
  33. ZapperZ

    VOTE GROUP 1 Photo Contest - From Dusk To Dawn

    This promises to be a difficult contest to vote on. You have one vote for each group. Please vote for the photo that best represents our theme: a picture taken either at dusk or at dawn. {This contest has one disqualification due to size. All participants are strongly urged to pay close...
  34. ZapperZ

    PF PHOTO CONTEST - From Dusk To Dawn (8/16-8/22)

    From Dusk To Dawn This week's contest will be on pictures taken EITHER at dusk or at dawn. Your picture must clearly show that part of the day. It is not sufficient to simply show a clock, other timing devices, a person waking up, etc. to indicate that the picture was taken at dusk or dawn...
  35. ZapperZ

    VOTE Photo Contest - Humpty Dumpty

    We have a large variety of interpretation to this week's contest. So the voting will be interesting. PLEASE NOTE: You must vote for the picture that BEST REPRESENTS an interpretation of a scene in the nursery rhyme. The representation should be clear. 1. Borek : Humpty Dumpty had a great fall...
  36. ZapperZ

    FINAL VOTE Photo Contest - Bad Picture 3

    We have some really awful pictures for you to vote on in the final round of this contest. 1. lisab http://img217.imageshack.us/img217/327/badkittytr9.jpg 2. turbo-1 3. Moonbear 4. GeorginaS 5. Evo http://img134.imageshack.us/img134/417/camerapictures295ae1.jpg 6...
  37. ZapperZ

    PF PHOTO CONTEST - Humpty Dumpty (8/9-8/15)

    Humpty Dumpty Humpty Dumpty sat on a wall; Humpty Dumpty had a great fall. All the King's horses And all the King's men Couldn't put Humpty together again! Yes! Humpty Dumpty is our theme this week. Your picture must contain, as it main subject a visualization of some part of this...
  38. ZapperZ

    VOTE Photo Contest Group 2 - Bad Picture 3

    This is the second polling group for this contest. Please vote for the picture that best represents the intent of the theme, which is a bad picture. 1. rewebster [no picture ] 2. Zenparticle http://img394.imageshack.us/img394/9756/picture082pk0.jpg 3. ~christina~...
  39. ZapperZ

    VOTE Photo Contest Group 1 - Bad Picture 3

    We have a lot of submission this week, but strangely enough, I find that some of the pictures to really be not "bad pictures". Still, it is up to the members to decide. Please make sure you vote for a BAD picture that best represents the intent of the theme. You have one vote to cast in each...
  40. ZapperZ

    FINAL VOTE Photo Contest - Cloud Nine

    This promises to be a very difficult final round. You have one vote to cast on the picture that best represents our theme - clouds! 1. hypatia 2. Alex:) http://img224.imageshack.us/img224/5396/mousilaukecloudug1.jpg 3. Andre 4. Borek 5. Air 6. larkspur...
  41. ZapperZ

    PF PHOTO CONTEST - Bad Picture 3 (8/2-8/8)

    Bad Picture 3 This theme has always been one of our more popular theme. Find a photo that you took that is really bad. This degree of "badness" can be due to fuzzyness, underexposure, overexposure, etc. Any picture that it technically bad qualifies. NOTE: You cannot use pictures that have...
  42. ZapperZ

    VOTE Photo Contest Group 2 - Cloud Nine

    This is the second polling group for this contest. You have one vote to cast here. 1. Andre 2. Borek 3. rewebster 4. Integral 5. Air 6. ~christina~ http://img105.imageshack.us/img105/6097/sunslandscaperaysbywhitfo4.jpg 7. larkspur...
  43. ZapperZ

    VOTE Photo Contest Group 1 - Cloud Nine

    This promises to be another difficult contest to vote on. There are 15 entries spread out over 2 different polling threads. You have one vote to cast in each poll. Please vote for the picture that best represents our theme, which is focused on clouds. 1. edward...
  44. N

    What Factors Affect the Emission of a Photon by an Electron?

    an electron travels at 1 x 106 m/s. when it hits a target, its speed decrease in half and a photo is released. find the phton's wavelength. so far i know E photon = (hc) / lamda what about the speed? does the photons' energy same as kinetic energy of the electron which is just 1/2 mv ^2...
  45. ZapperZ

    PF PHOTO CONTEST - Cloud Nine (7/26-8/1)

    Cloud Nine This week's theme is simple - it is on clouds in the sky. Zz. Contest Rules: 1. Any digital photo or digitally-scanned photo relevant to the theme will be accepted within the contest period. In case there's a gray area, or you're not sure if the picture is suitable, check...
  46. ZapperZ

    VOTE Photo Contest - In A Fowl Mood

    This week's voting is going to be tough because of all the gorgeous pictures submitted. Still, you have to vote for one. Please choose a picture that best represents our feathered friends. 1. Janus http://home.earthlink.net/~jparvey/sitebuildercontent/sitebuilderpictures/seagulls.jpg 2...
  47. ZapperZ

    PF PHOTO CONTEST - In A Fowl Mood (7/19-7/25)

    In A Fowl Mood Our theme this week focuses on our feathered friends. This includes birds, chickens, geese, ducks, ostritches, penguins, storks, cranes, seagulls, ... well, I think you know what I mean. Please note that these should be the main subject of your picture and not merely incidental...
  48. ZapperZ

    VOTE Photo Contest - What Is That?

    We have a set of rather interesting pictures of unusual objects. So this ought to be fun. Please vote for the picture that best represents our theme. 1. Math Jeans 2. hypatia 3. Moonbear 4. Janus...
  49. ZapperZ

    PF PHOTO CONTEST - What Is That? (7/12-7/18)

    What Is That? This week, your photos must be on something that is unfamiliar or unusual. It should tend to evoke a response of "What is that?" from a viewer. Any unfamiliar or unusual object qualifies. Note however that pictures of familiar objects but taken either at an unusual angle or...
  50. ZapperZ

    VOTE Photo Contest - Fun In The Sun

    A surprisingly small number of photos submitted for a theme that is right smack in the middle of the summer months here in the northern hemisphere. Still, we have a good group of photos. Please choose a photo that best depicts the spirit of having fun in the sun. 1. matthyaouw 2...
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