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Home > All Images > 2004 > August > 31 Aug 2004

Images Dated 31st August 2004

Choose from 68 pictures in our Images Dated 31st August 2004 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.


Wundt illusion Featured 31 Aug 2004 Image

Wundt illusion

Wundt illusion. This illusion was created by the psychologist Willhelm Wundt in the 19th century. It is the exact opposite of the Hering illusion. It exploits the brain's understanding of perspective to fool it into thinking that the two horizontal red lines bow inwards. In fact they are straight and parallel. This is achieved due to the presence of the grey lines radiating from 2 points. They give the appearance of depth, with the middle of the image appearing closer than the top. The brain compensates for this, and the illusion is created

© SCIENCE PHOTO LIBRARY

Researcher testing Lego robots playing Pacman Featured 31 Aug 2004 Image

Researcher testing Lego robots playing Pacman

Lego Pacman game. Researcher testing a three dimensional game of Pacman played by Lego robots. In this game the player operates the "good" yellow robot by remote control whilst the "bad" red robots will automatically try to capture it. The game is played in a maze marked out with black lines on a white background. The red robots are controlled by Mindstorm computer Lego bricks which are programmed to chase and capture the yellow robot. The red robots negotiate the maze with the help of optical sensors that recognize the black lines. The bad robots also have optical sensors that help them to locate the good robot. Photogra- phed at LegoLab, University of Aarhus, Denmark

© VOLKER STEGER/SCIENCE PHOTO LIBRARY

Yersinia pestis bacterium Featured 31 Aug 2004 Image

Yersinia pestis bacterium

False-colour transmission electron micrograph of Yersinia pestis (blue & yellow), the bacterium which causes bubonic plague (the Black Death). The bacterium is primarily a flea-carried pathogen of rats. Transfer to man occurs when a flea is obliged to leave its dead rodent host and feed on human blood. Infection is rapid, causing swellings in the lymph nodes (buboes) and leading to septicaemia & pulmonary infection. Extensive control measures, directed against the rats as well as their fleas, have essentially banished the plague from Europe, but there are still many regions of the world where the disease occurs. Magnification: x16, 500 at 6x4.5cm size

© A.B. DOWSETT/SCIENCE PHOTO LIBRARY