USU’s Science Unwrapped: the Green Beam is back April 30

LOGAN – At Utah State University’s April 30 Science Unwrapped presentation, Cache Valley residents will see a nighttime sight they haven’t seen for several years: The Green Beam. Formally known as the Rayleigh Scatter Lidar, the bright green laser, situated atop USU’s Science Engineering Research building, is used to study atmospheric dynamics.Tight funding has limited the lidar’s use in recent years but the familiar green beam will shine for Science Unwrapped’s final presentation for spring 2010: “Light Years: The 50th Anniversary of LASER.”Featured speaker for Friday’s event is John Sohl, an atomic and laser physicist with Weber State University. Sohl’s talk, hosted by USU’s College of Science, begins at 7 p.m. in the Emert Auditorium, Room 130, of the Eccles Science Learning Center on campus. Admission is free and open to all ages.”LASER stands for ‘Light Amplification by Stimulated Emission of Radiation,’” says Sohl, professor in WSU’s Department of Physics. “We’ll talk about the science behind this amazing technology that impacts our lives in increasing ways.”Following Sohl’s presentation, attendees are invited to try hands-on activities including an exhibit developed by USU’s award-winning chapter of the Society of Physics Students. The undergraduate student group received one of 20 national LaserFest Outreach Grants and has created laser mirror mazes to share with the community. Free refreshments will be served.For more information, call 435-797-3517, visit or view Science Unwrapped at USU on Facebook.

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