"In 2011, without warning, a skyscraper in South Korea began to shake uncontrollably and was immediately evacuated. Was it an earthquake? A terrorist attack? No one seemed quite sure. The actual cause emerged later: Twenty-three middle-aged Koreans were having a Tae Bo fitness class in the office gym on the twelfth floor. Their beats had inadvertently matched the building's natural frequency, and this coincidence caused the building to shake at an...

A unique program that introduces electromagnetic waves, their behaviors, and how scientists visualize this data. Each region of the spectrum is described and illustrated with engaging examples. Learn about Radio Waves, Microwaves, Infrared Waves, Visible Light Waves, Ultraviolet Waves, X-Rays, and Gamma Waves. Come and explore the amazing world beyond the visible!

"Is it possible for something or someone to be made invisible? This question, which has intrigued authors of science fiction for over a century, has become a headline-grabbing topic of scientific research. In this book, science writer and optical physicist Gregory J. Gbur traces the science of invisibility from its sci-fi origins in the nineteenth-century writings of authors such as H. G. Wells and Fitz James O'Brien to modern stealth technology,...