Credit: RHYS LEWIS, AHS, DECD, UNISA/ANIMATE4.COM/SCIENCE PHOTO LIBRARY

Caption: Greenhouse warming mechanism. Animation showing how the energy of sunlight is trapped in a greenhouse. Short-wave radiation (such as ultraviolet, purple arrows) passes through the glass and heats objects inside. The animation then zooms in on an inset, showing the effect at the atomic level. An atom is shown with its electrons (black dots) occupying energy levels (circles) around the nucleus (red and blue). The outermost electron is shown absorbing the energy of the short-wave radiation. This excitation causes the electron to rise to a higher energy level, further from the nucleus. The electron then falls to a lower energy level, emitting long-wave radiation (infra-red, red arrows). The view zooms back out to the greenhouse, showing the infra-red radiation (heat) emitted by objects inside the greenhouse. Unlike the ultraviolet radiation, this infra-red radiation cannot pass through the glass and is reflected back and retained inside, causing the temperature to rise. This is the principle behind global warming, where the greenhouse effect leads to increased warming of a planet.

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Greenhouse warming mechanism, animation

K005/6306 Rights Managed

Downloadable master

Duration: 00:00:37.12

Frame size: 1920x1080

Frame rate: 24

Audio: No

Format: QuickTime, Photo JPEG 100%, progressive scan, square pixels

File size: 731.9M

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Capture format: QuickTime Animation

Codec: Photo - JPEG

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