Photo Definition and 505 Threads

Homework Statement In converting electrical energy into light energy, a sixty-watt incandescent light bulb operates at about 2.2% efficiency. Assuming that all of the light is green light (wavelength approximately 5500 Å), determine the number of photons per second given off by the bulb and...

i have to take a photo demonstrating a Kinematics Phenomena. I do one every unit but this unit is really sutmping me. For the optics unit i took a picture of a laser bending through glass, for waves i took a picture of light interfering through a diffraction grating, for electricity i took a...

Please have a look at these pictures and see how natural framing can make the difference. Please vote for the best natural framed picture. 1. Matthyaouw 2. Edward http://img171.imageshack.us/img171/3497/1000586q.jpg 3. Borek 4. Gokul43201 5. Fuzzyfelt 6. Marzena...

what will be the effect on photoelectric current if the intensity and frequency of incident photons are increased simultaneously. ? Will the current remain almost same? if so , why?

1.ZapperZ http://img17.imageshack.us/img17/7481/img2028gm.jpg 2.Matthyaouw 3.Andre 4.Borek 5.Marzena Contest Thread

Farmyard animals Photos with farmyard aanimals on them, please :) 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 with me...

1.Borg 2.ZapperZ 3.AbstractPacif http://img48.imageshack.us/img48/5168/img0962y.jpg 4.Andre 5.Fuzzyfelt 6.Marzena 7.Borek 8.Sganesh88 http://img26.imageshack.us/img26/674/28567437.jpg Contest Thread

1.ZapperZ 2.Ms Music 3.Hypatia 4.Andre 5.Borek 6.Marzena Contest Thread

Normal service resumes, contests starting on a saturday again Putting things in perspective Photos with strong perspective, odd perspectives etc etc. Be as creative as you like. Contest Rules: 1. Any digital photo or digitally-scanned photo relevant to the theme will be accepted within...

Three's a crowd Photos with crowds of three or more this week 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 with me...

1.Andre 2.Borek 3.Marzena 4.Edward http://img134.imageshack.us/img134/8771/copyof1001517.jpg 5.Borg 6.Physics girl phd 7.Turbo-1 8.Matthyaouw 9.Kronos5253 Contest Thread

Something new The only restriction this week is that is must be a new photograph, taken between now and the close of the contest. 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...

1.Andre 2.ZapperZ 3.Borek 4.Marzena 5.Edward http://img529.imageshack.us/img529/5134/a0099bw8.jpg Contest Thread

Green living Interpret as you will. 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 with me first. 2. Please resize your...

1.jgens http://img12.imageshack.us/img12/6505/cimg0017c.jpg 2.Hypatia http://i82.photobucket.com/albums/j269/hypatia3811/henryfordhomenatsteppingstones.jpg 3.Marzena 4.Human4d 5.Equate http://img34.imageshack.us/img34/4293/brooklynbridgez.jpg 6.ZapperZ 7.Fuzzyfelt...

Made of stone Show me something manmade that is made of stone. I couldn't come up with a catchier name. Sorry, I'm tired. 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...

1.Integral 2.Matthyaouw 3.ZapperZ 4.Borek 5.Andre Contest Thread

Something fishy Interpret as you will 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 with me first. 2. Please resize...

1.ZapperZ 2.Andre 3.Johnathan Scott 4.Matthyaouw 5.Marzena http://www.bpp.com.pl/IMG/marzena_around_the_house.jpg 6.Borek 7.Ivan Seeking http://img32.imageshack.us/img32/3034/light2k.jpg 8.Edward http://img154.imageshack.us/img154/7924/copyofscan10001001.jpg...

Around the house Get creative with what you've got close to hand. Show me photos taken within the walls of your house. Not in the garden, not the view out the window but what's actually inside it. Get snapping :smile: Contest Rules: 1. Any digital photo or digitally-scanned photo...

1.Ivan Seeking http://img191.imageshack.us/img191/3980/1005z.jpg 2.Shramana http://img259.imageshack.us/img259/2981/summer09194.jpg 3.Waht http://img259.imageshack.us/img259/1914/1251085461img2156.jpg 4.Hypatia http://i82.photobucket.com/albums/j269/hypatia3811/HPNX0051.jpg...

Summer Holidays Show me where you've been on your holidays this summer. If you've not not been away this summer, show me any previous trip away. Tell me a bit about where you went too :smile: Contest Rules: 1. Any digital photo or digitally-scanned photo relevant to the theme will be...

1.Borek 2.Ivan Seeking http://img25.imageshack.us/img25/8674/1011her.jpg 3.Chroot http://lh3.ggpht.com/_y270vw9jgGs/SodU2fbmGYI/AAAAAAAAHhE/tUWSnmcy9C0/s640/DSCR-3213.jpg 4.Integral 5.Andre 6.Marzena 7.Billiards http://img38.imageshack.us/img38/9206/12p1010324.jpg 8.Hypatia...

In to the light I've heard it said that it is not a good idea to shoot into the light when taking photos but I don't know, I think it can be pretty cool. Show me photos taken pointing towards the sun or your light source. Contest Rules: 1. Any digital photo or digitally-scanned photo...

Oh god, cute overload. Vote for the picture(s) that makes you smile the most. 1.Ivan Seeking http://img80.imageshack.us/img80/7281/isaac.jpg 2.Junglebeast http://img193.imageshack.us/img193/21/trollsp.jpg 3.RobertM 4.Ben Niehoff 5.Integral 6.Turbo-1 7.ZapperZ...

Make me smile The challenge this week is to make me (and the voters) smile. Votes should go to the one(s) that made you smile the most. No other restrictions on subject. Contest Rules: 1. Any digital photo or digitally-scanned photo relevant to the theme will be accepted within the...

1.Brewnog 2.Chroot 3.Turbo-1 4.Ivan Seeking http://img40.imageshack.us/img40/5789/1043n.jpg 5.ZapperZ Contest Thread

Note: Matthyaouw is offline for sometime due to technical problems and I offered to take over until he is back. Chiaroscuro Chiaroscuro(italian) is a term in art for a contrast between light and dark. An another form is Rembrandt lighting. So this week, it is about the nicest picture of...

Note: Matthyaouw is offline for sometime due to technical problems and I offered to take over until he is back. Please, cast your vote. 1. junglebeast http://img193.imageshack.us/img193/626/turf.jpg 2. chroot...

Back from my travels now so thanks to those who ran this for me while I was away. Home Turf I know we've had a similar contest before, but I fancied revisiting it. Show me your home turf. Your city, your street, anywhere close to where you live or lived. I will post the voting thread next...

Hello, I'm back from my travels. Thanks to Kurdt for taking over from me while i was gone. 1.Turbo-1 2.Andre 3.GeorginaS 4.ZapperZ Contest Thread

Food & Drink We've had a couple of these in the past but I'm sure you all have plenty of food themed pics. matthyaouw should be back next week, in which case normal service will be resumed. Contest Rules: 1. Any digital photo or digitally-scanned photo relevant to the theme will be...

GeorginaS Greg Bernhardt https://www.physicsforums.com/misc/swiss.jpg colonelcrayon http://img11.imageshack.us/img11/62/1070768.jpg ZapperZ Andre Marzena Borek edward http://img199.imageshack.us/img199/333/stormr.jpg moose I'm afraid Ben's had to be disqualified...

Stormy Weather Here is a very broad easily interpreted topic. :smile: 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 with me...

junglebeast http://img34.imageshack.us/img34/9237/flyo.jpg Andre ZapperZ colonelcrayon http://img193.imageshack.us/img193/3856/p3110203.jpg Ok small list this week. Vote away! :smile:

Fly me away Interpret as you will 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 with me first. 2. Please resize your...

1.Chroot 2.Turbo-1 3.Junglebeast http://img20.imageshack.us/img20/9836/lifewasgood.jpg 4.Wildman 5.ZapperZ http://img20.imageshack.us/img20/9955/img5958l.jpg 6.Borek 7.Matthyaouw 8.Marzena 9.Andre 10.Fuzzyfelt...

Out the window Interpret as you will 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 with me first. 2. Please resize your...

1.Integral 2.Colnelcrayon http://img189.imageshack.us/img189/7896/whittierblackstone16.jpg 3.Equate http://img195.imageshack.us/img195/9262/02222x.jpg 4.Edward http://img4.imageshack.us/img4/7639/copyof1000135.jpg 5.ZapperZ 6.Andre 7.Borek 8.Marzena...

The blues Interpret as you will 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 with me first. 2. Please resize your digital...

1.Marzena 2.Integral 3.Jasonrox http://img30.imageshack.us/img30/6757/img0676k.jpg 4.Borek 5.ZapperZ 6.Matthyaouw 7.GeorginaS 8.Turbo-1 Contest Thread

The top point reached, is the max. speed obtained. Am i wrong? I am new into physics.

Hello stranger! Photos of people you don't know. 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 with me first. 2. Please...

1.ZapperZ 2.Junglebeast http://img37.imageshack.us/img37/246/p9031294.jpg 3.Edward http://img266.imageshack.us/img266/1535/1001344jpgwheels.jpg 4.Cyrus http://img38.imageshack.us/img38/4954/wheelm.jpg 5.Andre 6.Moose 7.Brewnog 8.Borek 9.Matthyaouw...

Wheels Wheels are the theme this week. Sorry it's late. 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 with me first. 2...

Motion Photos that convey a sense of movement or motion please. 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 with me first...

1.Borek A is for acid and alkali 2.ZapperZ B is for baseball 3.George Jones C is for C (the speed of light) http://img43.imageshack.us/img43/9248/lightspeed.jpg 4.Turbo-1 D is for ducks 5.Ms Music E is for entertainment, and eeeeek! 6.Marzena F is for fog...

Alphabetical order Person one posts something beginning with A, person two posts something beginning with B, then C and so on and so forth. 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...

1.Marzena 2.ZapperZ 3.Equate http://img196.imageshack.us/img196/6771/bellagio.jpg 4.Signerror 5.MattRSK 6.Turbo-1 7.Galatea 8.Andre 9.Matthyaouw 10.Borek Contest Thread

Night lights Photos at night, with things that are light. Interpret 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, or you're not sure if the picture is...