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Images Dated 2nd October 2003

Available as Framed Prints, Photos, Wall Art and Gift Items

Choose from 29 pictures in our Images Dated 2nd October 2003 collection for your Wall Art or Photo Gift. Popular choices include Framed Prints, Canvas Prints, Posters and Jigsaw Puzzles. All professionally made for quick delivery.

Image of a rainbow Featured 2 Oct 2003 Print

Image of a rainbow

Rainbow. It is an arc of concentric bands of light in the colours of the spectrum. It is seen in the sky when the Sun is behind the observer and raindrops are in front. The separation of the colours is caused by the reflection and refraction of the sunlight in the water drops. The larger the drops, the brighter are the colours. A faint secondary rainbow is sometimes visible above the primary one. In the primary rainbow the Sun's rays experience only one reflection in the water drops, whereas the secondary rainbow is caused by those rays which undergo two reflections. This also causes the reverse order of the colours in the two rainbows

© Pekka Parviainen/Science Photo Library

Parasitic nematode worm Featured 2 Oct 2003 Print

Parasitic nematode worm

Parasitic nematode worm (Ascaris lumbricoides). This worm inhabits the human intestine. An adult female, as seen here, may measure 35 centimetres in length. Infestation with the worms (ascariasis) causes abdominal pain, vomiting, diarrhoea and peritonitis. The female lays up to 200, 000 eggs per day, which are excreted in the faeces and ingested by a new host through contaminated water or food. The larvae hatch in the small intestine and travel through the blood to the lungs where they can provoke pneumonia. The juvenile worms migrate up the airway and are swallowed, thereby returning to the intestines to mature. Treatment is with anthelmintic drugs