Heinrich Rudolf Hertz was a German physicist who clarified and expanded the electromagnetic theory of light that had been put forth by Maxwell. He was the first to satisfactorily demonstrate the existence of electromagnetic waves by building an apparatus to produce and detect radio waves.
The Google logo takes the form of electromagnetic waves (in Google colours – blue, red, yellow and green) to pay tribute to German physicist Heinrich Rudolf Hertz on his 155th birth anniversary. Hertz was born at Hamburg on February 22, 1857. 
Second, Hertz found out how to make the electric and magnetic fields detach themselves from wires and go free as Maxwell’s waves. Hertz died at the young age of 36 on New Year’s Day 1894. There is a lunar crater on the dark side of the Moon named after him.
Unlike recent Google doodles that used complex JavaScript for animated doodles, the Hertz Google doodle is a relatively simpler animated GIF image. Google has, till the Hertz doodle, posted 1308 doodles on its home page since the first ever Google doodle back on August 30, 1998.
