Laser measurement of the velocity of a gas stream
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Laser measurement of the velocity of a gas stream
MODEL RELEASED. Laser velocity measurement. Technician uses beams from a laser to measure the velocity of air coming from a dummys mouth which is simulating breathing. The 4 beams of this Laser Doppler Velocimeter (LDV) or anemometer use the Doppler effect to measure the velocity of the gas. This effect raises or lowers the frequency of light when it is scattered by fine particles moving in the air. The gas velocity can be measured by monitoring the Doppler shift. Dummies like this are used to assess peoples exposure to airborne contaminants. Photograph of research done by the Health and Safety Laboratory in Britain
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 6435617
© CROWN COPYRIGHT/HEALTH & SAFETY LABORATORY /SCIENCE PHOTO LIBRARY
Anemometer Breathing Dummy Laser Lasers Pollution Scientific Speed Test
EDITORS COMMENTS
This print captures a moment of cutting-edge scientific research conducted by the Health and Safety Laboratory in Britain. The image showcases a technician utilizing laser beams to measure the velocity of a gas stream, specifically air being exhaled from a dummy's mouth to simulate breathing. This innovative technique employs Laser Doppler Velocimeter (LDV) or anemometer technology, which utilizes the Doppler effect to accurately gauge gas velocity. The LDV system operates by analyzing how the frequency of light changes when it interacts with fine particles suspended in the air. By monitoring this Doppler shift, scientists can precisely determine the speed at which the gas is flowing. Such measurements are crucial for assessing people's exposure to airborne contaminants and evaluating pollution levels. The photograph not only highlights advanced technological tools but also emphasizes their practical application in real-life scenarios. It serves as a testament to mankind's relentless pursuit of knowledge and understanding through scientific exploration. As we delve into this mesmerizing image, we witness science unraveling before our eyes—a symphony of lasers illuminating unseen phenomena within our atmosphere. Through meticulous experimentation and precise measurement techniques like these, researchers strive towards creating safer environments for all while pushing boundaries in fields such as pollution control and health assessment.
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