What does the above doodle mean? Think wave and frequency. Does it look like a graph you could find in physics textbooks? You are right, this is a graph resembling an electromagnetic wave.
The Google Doodle of 22 February is one to celebrate the 155th birthday of Heinrich Rudolf Hertz, a German physicist who was the first man to broadcast and receive radio waves. His works laid the foundation of modern communication technology. If you have ever heard of the unit “Hz”, which is used to measure frequency, is named after him in 1930.
I like this doodle a lot. It is so stylish and simple. Why not Google consider using this as the next new logo?