Results for "electromagnetic waves"
Found 3 results
The Melted Candy Bar That Changed Cooking
In 1945, a melted candy bar led engineer Percy Spencer to discover how 2.45 GHz radar waves heat fo…
The Glass That Killed the Spark
In 1887, a stray pane of glass accidentally revealed the photoelectric effect when Heinrich Hertz d…
Sparks in the Dark: Proving Invisible Waves
In 1887, Heinrich Hertz proved invisible electromagnetic waves existed by ditching wires, tuning co…