"Radio waves aren't just for listening to your favorite radio station! They are used to make GPS receivers and wireless internet work. Scientists use radio telescopes to help them study space. With engaging, at-level text and colorful images, readers learn about radio waves and how we use them every day"--.
Presents essays that offer varying opinions on whether cell phone use causes cancer, discussing the evidence that exists on both sides of the issue and barriers to conducting research on the subject.
A short biography of late nineteenth-century Italian electrical engineer and Nobel laureate Guglielmo Marchese Marconi that profiles his life and works which included the development of a practical wireless telegraphy system known as the radio.
Explains radio waves and radio signaling and discusses how energy carries information, how messages are imprinted on energy, how signals move across space, how signals are detected, and other related topics.
