EP 46 · 43:18

The true shape of the Milky Way

From America 250: The Breakthroughs That Built American Science — Part 1

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43:18side. >> Globular cluster clusters not a candy but would make a great candy brand. 1922 the uh the particle nature of electromagnetic radiation something about a lot. >> Yes. This is uh physicist Arthur H. Compton at Washington University in St. Louis. He demonstrated that light is indeed a photon. There were several experiments beforehand that were showing that light is a photon and a particle, but this is where he showed that light literally acts like a billiard ball.

From the episode
  1. EP 46

    America 250: The Breakthroughs That Built American Science — Part 1

    Part one of our America 250 special traces the inventions, institutions, and scientific breakthroughs — from Franklin to Sputnik — that helped build the United States into a global scientific power.

    America 250: The Breakthroughs That Built American Science — Part 1

America 250History of Science