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.

View More On Wikipedia.org
Recent contents Top users
  1. ZapperZ

    Photo Contest - Water, Water, Everywhere (9/27-10/3)

    Water, Water, Everywhere! No, this is not a contest about Hurricane Katrina, but pictures from that do qualify. In this contest, the main subject of your picture must be water - be it in an ocean, flowing in a river, in a glass, or coming down like rain. Contest Rules: 1. Any digital...
  2. ZapperZ

    Photo Contest - Falling for Autumn (9/19-26)

    Falling for Autumn This week marks the beginning of Fall/Autumn in the northern hemisphere. So the theme of our photo contest this time will be all about Fall/Autumn. Any picture with a clear connection to this season of the year is eligible. Note that pictures tied to specific celebrations...
  3. DaveC426913

    Satellite Photo: Is It Plausible?

    I'm highly skeptical. This guy claims to have just luckily caught this pic of a satellite through his scope with a handheld digital camera. Is this plausible at all? http://img237.imageshack.us/img237/4535/dscn0210mq7.jpg"
  4. ZapperZ

    Photo Contest - Labor Of Love (9/1-9/10)

    Labor of Love Sept. 4th is Labor Day holiday here in North American (both the US and Canada). To mark that occassion, the theme of our contest involves pictures that you took at your place of work OR school. This contest will run a few days longer than usual since I will be on vacation...
  5. zoobyshoe

    Photo Contest - Crop This Picture

    This is an old snapshot I found at the swap meet: All it says on the back is "summer 1948". I am thinking of doing a drawing of it, and just using that scrawled note as the title of the drawing, Summer 1948, but it feels like it needs cropping to improve the composition. I've tried...
  6. ZapperZ

    Photo Contest - I'm Ready For My Closeup, Mr. DeMille (8/23-8/30)

    I'm Ready For My Closeup, Mr. DeMille! This week's theme is all about close-up pictures. If you've used the close-up macro on your camera, then that picture qualifies. However, your picture need not be taken only using this function. Any picture that is a closeup of, or up close to, an object...
  7. ZapperZ

    Photo Contest - Bridge Over Troubled Water (8/16-8/22)

    Bridge Over Troubled Water This week's theme is all about bridges! It can be anything from the covered Bridges of Madison Country, to the hilarious Tacoma Narrows bridge. A bridge (or bridges) must be the main focus of your picture. Contest Rules: 1. Any digital photo or...
  8. Moonbear

    Disqualified in the photo contest

    I keep finding I want to share other photos that keep within the themes of the photo contest threads, but would be disqualified, either because someone else took them, or I already submitted one but have others that fit the theme I want to share, or I've previously touched up the photos with...
  9. ZapperZ

    Photo Contest - You're So Cold, You're So Cold (8/9-8/15)

    You're So Cold, You're So Cold! A few weeks ago we had a photo contest to depict the epitome of summer. This time, we go the opposite direction. The photo contest this week requires a photo which (i) makes you feel cold, (ii) leaves you with a cold feeling, or (iii) gives you the chills! So...
  10. ZapperZ

    Photo Contest - A is for August (8/1-8/7)

    PF Photo Contest - "A" is for ... August! (8/1-8/7) "A" is for ... August! It's the first day of August, and we will do a contest that salutes the first letter of the alphabet. Your picture must prominently feature something that begins with the letter "A". You may want to point it out in...
  11. ZapperZ

    Photo Contest - What's New Pussycat? (7/24-7/31)

    What's New Pussycat? In honor of Evo's cat Sherman, this photo contest is all about our feline friends. Your picture must have at least a cat as the main subject, and this can be cat/s ranging from the cuddly, domestic pets to the king of the jungle. Contest Rules: 1. Any digital photo...
  12. ZapperZ

    Photo Contest - Summer Lovin' (7/16-7/23)

    Summer Lovin' The theme this time is all about summer. Anything or any activity that is the epitome of summer qualifies. So use your imagination. Contest Rules: 1. Any digital photo or digitally-scanned photo relevant to the theme will be accepted within the contest period. In case...
  13. T

    Are Canadian otters cuter than American otters?

    http://www.astroskwurl.net/forum/post.php?id=692" Submit your photos ASAP! :smile:
  14. K

    Can a Photo Effect Us Like a Live Person?

    Hello, We may interact with any live person by its emitted, transmited, reflected spectrum or otherwise and get effects? We can't think about emission and transmission of emited radiations in consideration to this topic subject. So we now left about reflected spectrum--shape. colours...
  15. ZapperZ

    Photo Contest - When You Wish Upon A Star (7/6 - 7/16)

    When You Wish Upon A Star The Space Shuttle is back in space. To mark that occasion, the photo contest theme this time will be on anything and everything related to NASA, Astronomy, the Heavens, Space Travel/Exploration, etc. You will have a few extra days to submit a photo since I will...
  16. ZapperZ

    Photo Contest - Fire In The Sky (6/29-7/5)

    Fire In The Sky With the US Independence Day coming up on the 4th of July, what more appropriate theme to have right now than... FIREWORKS! All your pictures must feature fireworks. It does not, however, include unexploded fireworks (i.e. pictures of fireworks in a package in some store do...
  17. ZapperZ

    Photo Contest - Take Me Home, Country Road (6/22-6/28)

    Take Me Home, Country Road Our theme this week involves scenes from out in the country, rural, and wilderness area. 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 grey area, or you're not...
  18. ZapperZ

    Photo Contest - Gone But Not Forgotten (6/14-6/21)

    Gone, but not forgotten! Our theme this time involves objects, persons, structures, natural wonders, etc. that were once present, but not anymore. Obviously, in many cases, there's no way for me (or anyone) to check if everything that people submit no longer exists, so we will simply trust...
  19. G

    Is Cross-Posting Allowed on PF Forums?

    A friend and class-fellow of mine(B.B. Gupta) came up with the following interesting problem(during the starting days of our M.Sc.):-There's a photocell and a (monochromatic)source of light at a certain distance from the photocell.The source of light emits light of frequency lower than what is...
  20. ZapperZ

    Photo Contest - You Animal (6/6-6/13)

    You Animal! This time, our theme involves animal/s. Your picture must include animal/s as the main focus of the picture. 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 grey area, or you're not...
  21. ZapperZ

    Photo Contest - I Love A Man/Woman In Uniform (5/25-6/4)

    Please read our Contest Rules before submitting. Our theme this time is I Love A Man/Woman In Uniform With Memorial Day weekend coming up, I thought it would be appropriate to salute the men and women in the armed services. However, I will expand the subject matter even further by...
  22. ZapperZ

    VOTE Group 2 - Things that go bump in the night photo contest

    ToxicBug http://img111.imageshack.us/img111/5033/sleepscreen19uq.jpg neutrino ZapperZ Integral http://home.comcast.net/~Integral50/wolf.JPG SimplySolitary_ http://i15.photobucket.com/albums/a351/BeautifullyDemented666/Picture3.gif larkspur...
  23. ZapperZ

    VOTE Group 1 - Things that go bump in the night photo contest

    Great pictures everyone! brewnog http://personalpages.manchester.ac.uk/student/E.Smith-2/PICT0040_1.JPG Evo hypnagogue http://img479.imageshack.us/img479/4058/motel8dm.jpg Moonbear http://img159.imageshack.us/img159/9461/pfbumpinthenight2rg.jpg Mk...
  24. ZapperZ

    Photo Contest - Things That Go Bump In The Night (5/16-5/24)

    Please read our Contest Rules before submitting. Our theme this time is: Things That Go Bump In the Night. We want night shots pictures! These are pictures, taken by you, at night, utilizing your skill to take night shots. The pictures can be of any subject, but must be taken at night...
  25. ZapperZ

    What are the rules for the Re-VOTE Food Photo Contest?

    Folks, I screwed up! I missed the 2nd page of the photo contest submission. So to be fair, we are going to do this all over again and all the previous votes do not count. Again, apologies for the oversight. A smaller number of entries than the previous contest, but still excellent pictures...
  26. ZapperZ

    Final Vote-Your City/Neighborhood Photo Contest

    This is the final vote for the top vote-getters in this contest. You only have ONE vote. ZapperZ http://img224.imageshack.us/img224/9211/11717778tw.jpg hypatia http://i82.photobucket.com/albums/j269/hypatia3811/060403_CIC_vacuums.jpg Mk...
  27. ZapperZ

    Photo Contest - Food (May 7-May 14)

    FOOD Any pictures of food or food-related. The central focus of your picture must be about food. Constest Rules: 1. Any digital photo relevant to the theme will be accepted within the contest period. In case there's a grey area, or you're not sure if the picture is suitable, check with...
  28. ZapperZ

    Vote-Your City/Neighborhood Photo Contest 2

    Group 2 1. twisting_edge 2. scorpa 3. Gale http://img66.imageshack.us/img66/8914/newhampshire0314yj.jpg 4. Burnsys http://200.49.210.251/chasco/Contest.jpg 5. Integral https://home.comcast.net/~integral50/scenery/west.JPG 6. marcusl...
  29. ZapperZ

    Vote-Your City/Neighborhood Photo Contest 1

    Voting closes on May 12. We had 20 entries (1 disqualification). Well done, people! The entries are separated into 2 groups according to when they were submitted. You may vote once for EACH group. Top vote getters (to be decided later) will have a run-off in the final voting. 1. ZapperZ...
  30. ZapperZ

    Photo Contest - Your city/neighborhood (Apr 27 - May 5, 2006)

    I ran this past Evo, and she thought it was a good idea. Mind you, the last time she said that to one of my ideas here in GD, it resulted in the never-ending Disney thread! :) Here's how it will work: 1. A theme will be given during the photo contest period. 2. Any digital photo relevant to...
  31. E

    How does a photo detector detect?

    Please guys I really need your help. How does a photo detector detect? Can you also tell me where you got the info from. thanks einstein2603
  32. C

    How to recreate 1st prize photo of the Einstein Year Award?

    I've been very much intrigued by this picture of the surface tension of water supporting a metal paperclip: http://www.visions-of-science.co.uk/winners2005/win-18.htm" "By photographing it using a grill in front of the light source, the deformation of the water caused by the clip's weight...
  33. russ_watters

    What Challenges Did I Face in Capturing Images of the Andromeda Galaxy and Mars?

    New pics. These are a month old, but I forgot to upload them. They are from Sept 29. That was the first night it got really cold and I drove to the Poconos to set up shop, so while the sky was very clear and very dark, it was also very windy. First is another shot at the Andromeda Galaxy...
  34. Z

    MY photo isnt included, alphabetically

    its been on there for months, waiting to be alphabetized, i feel so left out :( * throws middle finger up*
  35. U

    Can someone help me identify this object in my photo?

    I was in the country where it was dark and the sky was clear and beautiful, so I aimed my Canon Powershot A85 (a great camera, but not as good as a digital SLR) towards the sky and did a 15 second exposure just to see if it would see the Milky Way (because my eyes could a bit.) The picture...
  36. Z

    Genuine Photo taken at a London Tube Station this morning

    I`m a little worried by the line "or look a bit foriegn"
  37. Labguy

    Stargazing Want to see an incredible solar corona photo?

    It isn't posted here, but my solar corona photo is posted on Space.com today. Format there allows larger size. http://www.space.com/amazingimages/cte.php?guid=42d0a2dc400360.56363193&cat=s
  38. russ_watters

    Stargazing Photo of my RA drive. Its an ETX-105.

    Attached is a photo of my RA drive. Its an ETX-105. The only visible problem is too much grease, but that's not a fatal issue. There are no chipped teeth, burrs, or anything else visible that could cause the problem. I watched run it for several minutes, then turned the scope off and moved...
  39. mattmns

    What Gesture Does This Photo Represent?

    What does this gesture mean? I always thought it was a "rock/er" gesture, I do not think a president would use it, but you never know I guess. I was thinking maybe 2, as in his second term, but I don't know. http://story.news.yahoo.com/news?tmpl=story&u=/050120/ids_photos_ts/r1352513220.jpg
  40. DaveC426913

    Unlock the Mystery of Taking a Reflection Photo in Your Own Backyard

    This is a 'How did I do this?' teaser. A couple of notes first: - The picture I include is simulated (Googled for a generic shot). Sorry, best I could do without the original. Ignore the fact that a] it's not me, and b] that the pic is indoors. - Even though this is a simulation, I actually...
  41. DaveC426913

    Incredible Impact Photo: First Ever Recorded Image

    Hey, anyone seen this incredible photo?? Impact pic Much larger pic APOD article http://www.news.com.au/common/story_page/0,4057,11480527%255E13569,00.html It appears to be the first ever recorded image of a meteor impacting the Earth (though for some reason, they're saying...
  42. T

    Creative Physics Photo Ideas for Grade 11 Class

    For my grade 11 physics class I need to take a picture of something and then explain the physics behind it all. I was wondering if any of you had some interesting ideas.
  43. check

    News Check Out Fake Photo of President Bush: "Whatever it Takes"

    Just caught this on CNN. Get over to http://www.georgewbush.com/ before they take it down. Take a look at the ‘whatever it takes’ photo. It shows a large crowd of US military personnel standing in formation listening to the president. Problem is, it’s a fake picture. If you look closely, you can...
  44. M

    Could This Be the First Photo of an Extrasolar Planet?

    http://news.bbc.co.uk/2/hi/science/nature/3644410.stm "Astronomers working in Chile think they may have taken the first direct image of a planet circling another star. The star, called 2M1207, is 230 light-years away and is very much smaller and fainter than our own Sun." I'm gazing at...
  45. Ivan Seeking

    A Must See: Amazing Snake Photo!

    A must see! Warning: If are a bit squeamish, esp wrt snakes, you may not want to view this picture. http://www.coasttocoastam.com/timages/page/nose_snake_lg.jpg
  46. pelastration

    First Photo of planet circling another star

    http://news.bbc.co.uk/2/hi/science/nature/3707185.stm The historic first image of a planet circling another star may have been taken by the Hubble Space Telescope. The "planet", 5-10 times the mass of Jupiter, is orbiting a small white dwarf star about 100 light-years away. Astronomers...
  47. T

    How Do Pets Help in Recovery from Surgery?

    My surgery is over, both basal cells. This is a photo of our two chihuhuas, Mal-lee (Molly) and Annie (on the right). Teacups. Very important members of our family.
  48. Greg Bernhardt

    Is this Chupacabra photo actually a Djinn in disguise?

    http://www.ufos-aliens.co.uk/ http://www.anomalies-unlimited.com/CaveBeing.html
  49. K

    Photo electric effect relate to determining the charge of an electron?

    how does the photo electric effect relate to determining the charge of an electron?
  50. R

    Invert and Blow Up Photo: Entire Photo Transformation

    Blow the photo up and invert it ( blacken out the sun) http://4forums.com/political/attachment.php?attachmentid=27
Back
Top