Photo Definition and 505 Threads

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. ZapperZ

    VOTE Photo Contest - I Love Fireworks

    We have a group of amazing fireworks pictures this week. So please vote for the one you like the most. 1. Borek 2. hypatia 3. neutrino 4. binzing 5. ZapperZ 6. dragon2200 https://www.physicsforums.com/showthread.php?t=242418". Zz.
  2. ZapperZ

    PF PHOTO CONTEST - Fun in the Sun (7/5-7/11)

    Fun in the Sun This week's theme involves all the fun activities we do during the warm days of summer. 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...
  3. ZapperZ

    PF PHOTO CONTEST - I Love Fireworks (6/28-7/5)

    I Love Fireworks! With the 4th of July looming this coming week, I thought it would be timely to have our theme on fireworks. While the spectacular show in the sky certainly is the main candidate for the theme, smaller "fireworks" such as sparklers, etc. also qualify. Zz. Contest Rules...
  4. ZapperZ

    VOTE Photo Contest - Peace and Tranquility

    We have a group of very strong pictures for this week's contest. Still, please vote for the best picture that conveys to you the sense of peace and tranquility. 1. Moonbear 2. BryanP 3. waht http://img145.imageshack.us/img145/1008/glacier3kg4.jpg 4. turbo-1 5. larkspur...
  5. C

    Where do epson manufacture their photo paper?

    Where do epson manufacture their photo paper?
  6. ZapperZ

    PF PHOTO CONTEST - Peace And Tranquility (6/21-6/27)

    Peace And Tranquility This week's picture must invoke the feeling of peace and tranquility to the viewers. 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...
  7. ZapperZ

    VOTE Photo Contest - Let's Go Shopping

    An interesting collection of pictures this week. Please vote for the picture that best represents our theme, which is on merchandise and atmosphere at shopping establishments. So let's go voting! 1. Alex:) http://img353.imageshack.us/img353/5743/sesameix9.jpg 2. fuzzyfelt...
  8. ZapperZ

    RE-VOTE PF Photo Conrtest - The Path Of Least Resistance - ONLY Group

    Due to the disqualification of a photo, we will have a re-vote for this group. Since we will now have a total number that will fit in just ONE group, the re-vote will be done for both groups just to be fair. [Please note that submissions are expected to follow the rules. While I may point out...
  9. ZapperZ

    PF PHOTO CONTEST - Let's Go Shopping (6/14-6/20)

    Let's Go Shopping! This week, the theme is shopping, or more specifically, on merchandise and "atmosphere" that one can find in a shopping store, mall, or department store. These must be the main subject of your photo. Zz. Contest Rules: 1. Any digital photo or digitally-scanned...
  10. ZapperZ

    VOTE Photo Contest - The Path Of Least Resistance - Group 2

    PLEASE VOTE IN THIS THREAD: https://www.physicsforums.com/showthread.php?t=240439 ************************************ This is Group 2 for this contest. Again, as instructed for Group 1, please vote for the picture that best represents or interpret the theme of this contest. 1. Janus...
  11. ZapperZ

    VOTE Photo Contest - The Path Of Least Resistance - Group 1

    PLEASE VOTE IN THIS THREAD: https://www.physicsforums.com/showthread.php?t=240439 ********************* There were a lot of amazing pictures for this contest. HOWEVER, please keep in mind that the THEME for this week's contest. You should selected a picture that best represents or interprets...
  12. ZapperZ

    PF PHOTO CONTEST - The Path Of Least Resistance (6/7-6/13)

    The Path Of Least Resistance You are allowed to interpret the theme this week any way you please. However, keep in mind that in the voting process, those who will be voting will be asked to make sure that the picture and the theme clearly match each other. Good luck! Zz. Contest Rules: 1...
  13. ZapperZ

    VOTE Photo Contest - June Is Bustin' Out All Over

    The contest started slow, but picked out steam later. We have a set of amazing pictures for this contest. Please vote for a picture that best represents our theme, which is something you'd find in the month of June. 1. Mech_Engineer 2. BryanP...
  14. ZapperZ

    PF PHOTO CONTEST - June Is Bustin' Out All Over (5/30-6/6)

    June Is Bustin' Out All Over! I may have dated myself by identifying this week's theme title with a tune from the musical "Carousel" :) Still... This week's theme is on all about things that you can see in the month of June - warm weather, sunshine, flowers, etc - unless of course you are...
  15. ZapperZ

    VOTE Photo Contest - I Kid You Not

    Whoa! With a few technical difficulties, we got through this first contest since I came back. Phew! Please vote for the picture that best represents our theme, which is on children! 1. Chi Meson 2. Integral 3. edward...
  16. ZapperZ

    PF PHOTO CONTEST - I Kid You Not (5/24-5/30)

    I Kid You Not Administrative note: Thanks to Mk for running the contest while I was away! This week, the theme will be on one of our most favorite subject: kids! Your picture must have, as its main subject, a child or many children. Zz. Contest Rules: 1. Any digital photo or...
  17. Mk

    Which Photo Will Win the VOTE PF Photo Contest?

    These are some really amazing photos! Vote for your favorite! 1. ~christina~ http://img145.imageshack.us/img145/5167/imgp0634gy3.jpg 2. Janus 3. binzing http://img169.imageshack.us/img169/5408/image0vw0.jpg 4. Mech_Engineer 5. larkspur...
  18. Mk

    Photo Contest Champions (5/10-5/17)

    PF Photo Contest Champions It has been exactly TWO YEARS since our weekly photo contest has started, and it comes the time to pit our best photos against each other in a single thread to celebrate and conclude. There is one week to select your best photo from any of the years' contests to see...
  19. Mk

    Vote PF PHOTO CONTEST - Sick as a Dog

    What makes you feel better when you are sick?. Vote for our photo contest winner this week. 1. Andre 2. matthyaouw 3. robphy http://img205.imageshack.us/img205/1986/pfphotosickasadogmz2.jpg <https://www.physicsforums.com/showthread.php?t=232956"> Thanks to each of you that...
  20. Mk

    Photo Contest - Sick as a Dog (5/3-5/10)

    Sick as a Dog Sorry to everybody for bombing my first photo contest, maybe this one will be simpler. I've been quite sick recently, what is something that helps you feel better when you are sick? Submit your photo to the PF Photo Contest! :biggrin: Contest Rules: 1. Any digital photo...
  21. O

    Photo voltaic cell Vs. solar heating panel

    Homework Statement i've been asked to compare the efficiency of a photo voltaic cell and a solar heating cell (an array of pipes). both will be exposed to a 150W bulb for an equal amount of time. Homework Equations for photo cell: P=IV for heating panel: P=fcT f=flow rate...
  22. Mk

    VOTE PF PHOTO CONTEST - Take me out to the ball game

    All of the pictures submitted this week follow a sporting event theme. Well done to everyone who participated. And congratulations to the future winners, to be archived for all history in the PF Photo Contest Winners thread. Vote for the picture that best represents our theme this week. 1...
  23. Mk

    PF PHOTO CONTEST - Candidate Doppelgänger Hunt (4/26-5/2)

    Presidential Doppelgänger Hunt Hi, Zz will be away for a few weeks and I will be managing the photo contest while he is gone. For our picture contest this week, I was thinking, whose picture do I see over and over? Every time I turn around in the magazines, newspapers, and television, I see...
  24. ZapperZ

    PF PHOTO CONTEST - Take Me Out To A Ball Game (4/19-4/25)

    Take Me Out To A Ball Game This week, all your pictures must be on sports and/or sporting events. Administrative update: I have selected MK to run the PF Photo Contest for the few weeks that I had mentioned earlier in another thread (4/26-5/17). I am sure he will do just wonderfully. He has...
  25. ZapperZ

    VOTE Photo Contest - A Sight For Sore Eyes

    All of the pictures submitted this week are sights for sore eyes. So well done to everyone who participated. Please vote for the picture that best represents our theme this week. Administrative update: I have selected MK to run the PF Photo Contest for the few weeks that I had mentioned earlier...
  26. P

    Where can I find a photo of mathematician and economist Charles Wiggins Cobb?

    Hello, I need to find a photo of the mathematician and economist Charles Wiggins Cobb (most known for his Cobb-Douglas production function). I have managed to gather little data on him but would really need to obtain a picture whether it is in electronic format, or if anybody has a book...
  27. ZapperZ

    Volunteer Needed To Run Photo Contest From 4/26-5/17

    A fun and imaginative volunteer is needed to run the PF Photo Contest starting on April 26, with the last contest being run on May 17. This person is responsible for coming up with the appropriate themes, posting the contest on the Saturdays during that period, setting up the voting rounds, and...
  28. ZapperZ

    PF PHOTO CONTEST - A Sight For Sore Eyes (4/12-4/18)

    A Sight For Sore Eyes Do you think you have a picture that, when someone sees it, he/she would say "Now that's a sight for sore eyes!"? If you do, then that picture fits our theme this week. Zz. Contest Rules: 1. Any digital photo or digitally-scanned photo relevant to the theme will be...
  29. ZapperZ

    VOTE Photo Contest - Things Are Looking Up

    This promises to be another difficult contest to vote on. It is filled with very strong and amazing pictures. So well done to everyone who participated. However, since we have so many strong pictures, voters are urged to put extra emphasis on how well each photo fit the theme. Our theme this...
  30. ZapperZ

    PF PHOTO CONTEST - Things Are Looking Up (4/5-4/11)

    Things Are Looking Up This week, it will be all about things that you can typically see only by looking up! 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...
  31. ZapperZ

    VOTE Photo Contest - Culture Club

    It appears that this was a difficult theme. The picture this week must clearly reflect a particular culture, and that seems to be a rather difficult task. Still, we have 4 contenders this week, so we'll see what happens. Again, please vote for the picture that best represents, and clearly...
  32. ZapperZ

    PF PHOTO CONTEST - Culture Club (3/29-4/4)

    Culture Club Your picture this week must have, as its main subject, something that represents a particular ethnic culture. This could be an architectural element, costumes, activities, etc. The cultural elements must be clear and distinct. Note that ethnic food does not qualify for this...
  33. ZapperZ

    Lingusitics VOTE Photo Contest - Sign Language

    Another group of strong pictures for this contest. Please vote for the picture that best represents our theme, which is on signs. 1. hypatia 2. alex_caps http://img174.imageshack.us/img174/6237/signckqx9.png 3. matthyaouw 4. Mech_Engineer 5. ZapperZ...
  34. ZapperZ

    VOTE PF PHOTO CONTEST - Black and White

    As someone I know said "Holy crap! This is going to be a difficult contest to vote on!" :) Please vote for the best picture that represents something in black and white. 1. larkspur 2. glondor 3. alex_caps http://bikeflat.com/albums/BayArea/DSC_5346.sized.jpg 4...
  35. ZapperZ

    PF PHOTO CONTEST - Black And White (3/15-3/21)

    Black and White This week's theme focuses on black and while. Your picture must have, as its central subject, something that is in black AND white. Note that your photo must be in color and there must be evidence that it isn't a black and white photo. Zz. Contest Rules: 1. Any...
  36. ZapperZ

    Which Photo Best Captures Green Acres?

    This week, people are free to interpret the theme as they wish, although some has taken it into a direction that I never thought of. So please vote for the picture that best represents our theme : Green Acres 1. larkspur 2. turbo-1 3. hypatia 4. BobG...
  37. ZapperZ

    FINAL VOTE Photo Contest - Dog Day Afternoon

    No matter which photo we all vote for, I think we all can agree that this will be a very tough choice for the final round. So a round of applause to all those who made it this far. Please vote for your favorite dog photo. 1. _MayDay_ http://img230.imageshack.us/img230/8972/pie5ho1.jpg...
  38. ZapperZ

    Photo Contest - Green Acres (3/8-3/14)

    Green Acres Green acres is the place for me. Farm livin' is the life for me. Land spreadin' out so far and wide Keep Manhattan, just give me that countryside. New York is where I'd rather stay. I get allergic smelling hay. I just adore a penthouse view. Dah-ling I love you but give...
  39. ZapperZ

    VOTE Photo Contest Group 2 - Dog Day Afternoon

    This is the second group in this contest. 1. lisab http://img155.imageshack.us/img155/843/maxwellwf4.jpg 2. Mech_Engineer 3. hypatia 4. Integral 5. alex_caps http://bikeflat.com/albums/uther/img039.sized.jpg 6. ZapperZ 7. Ivan Seeking...
  40. ZapperZ

    VOTE Photo Contest Group 1 - Dog Day Afternoon

    PF has gone to the dogs! Not only that, this could be a very difficult contest to vote on. So thanks to everyone who submitted a photo. You have 1 vote in each of the group. 1. ManDay 2. _MayDay_ http://img230.imageshack.us/img230/8972/pie5ho1.jpg 3. larkspur 4. binzing...
  41. ZapperZ

    PF PHOTO CONTEST - Dog Day Afternoon (3/1-3/7)

    Dog Day Afternoon PF Photo Contest has gone to the Dogs! This time, our canine friends will be the main subject of the photos for this contest. Please note that this theme is only on domesticated dogs. It does not include wild dogs, coyotes, wolfs, etc... Have fun! Contest Rules: 1...
  42. ZapperZ

    VOTE PF PHOTO CONTEST - Water Works

    As GeorginaS said in the thread, this is going to a challenge to selected just one picture for this contest. Everyone one of them is gorgeous. Still, you will have to select one that best represents our theme, which is on water as the main subject. Good luck to all! 1. _Mayday_...
  43. ZapperZ

    PF PHOTO CONTEST - Water Works (2/23-2/29)

    Water Works This week, your picture must contain water as the main subject. This can be out of a tap, in a glass, in a river, in lakes, or coming down from the sky. It is water, water, everywhere! Contest Rules: 1. Any digital photo or digitally-scanned photo relevant to the theme will...
  44. ZapperZ

    Which Photo Best Captures the Essence of Still Life?

    Another small but strong group of photos for this contest. Please vote for the picture that best represents our theme - Still Life 1. Mech_Engineer 2. larkspur 3. turbo-1 4. ZapperZ 5. waht http://img131.imageshack.us/img131/3520/viking1lg7.jpg 6. glondor...
  45. ZapperZ

    PF PHOTO CONTEST - Still Life (2/16-2/22)

    Still Life This is the photo version of the still life paintings. If you have seen still life paintings, or even have done one yourself in an art class, then you have an idea of what the theme is. However, this time, instead of taking your your paint brushes and canvas, you take a picture of...
  46. ZapperZ

    VOTE Photo Contest - My Funny Valentine

    Whoa! Obviously, many people are immune to this made-up day by Hallmark! :) This means that all 3 pictures will end up in our winners list. The question now will be: who will be on top? Please vote for the best picture that represents something connected to Valentine's Day. 1. larkspur...
  47. ZapperZ

    PF PHOTO CONTEST - My Funny Valentine (2/9-2/15)

    My Funny Valentine Valentine's Day is this week. So this would be an appropriate topic for this week's photo contest. Your picture must clearly show anything related to Valentine's Day (simply showing a box of candies isn't sufficient), or pictures that show depiction of love and affection...
  48. ZapperZ

    VOTE Photo Contest - Year of the Rat

    A strong group of pictures for this contest. Please vote for the best picture that represents either a Chinese New Year celebration, Chinese culture, rats, or mice. 1. glondor 2. 0TheSwerve0 3. ZapperZ 4. hypatia 5. mrjeffy321...
  49. ZapperZ

    PF PHOTO CONTEST - Year of the Rat (2/2-2/8)

    Year of the Rat This week, we will be celebrating the Chinese Lunar New Year, the Year of the Rat. So pictures of rats, mice, Chinese New Year festivals, or Chinese culture will qualify for this contest. Happy Chinese New Year to all our Chinese members! Zz. Contest Rules: 1. Any...
  50. ZapperZ

    VOTE Photo Contest - Don't Go Chasing Waterfalls

    We have a terrific set of photos for this contest, so it will be difficult. The theme this week is on waterfalls (I should have specified that it is not "falling water", but its too late now). So please vote for the picture that best represents our theme. 1. larkspur 2. scorpa 3...
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