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Abstract
excerpts.
Trading Cards
1848
Doppler Effect Observed for Stars
Light Waves
In 1842, the Doppler effect was proposed by Christian Doppler. First confirmed for sound in 1845, then for light in 1848.
Classical Physics
Story
“Everything is in flux.”
- Heraclitus
- 500 BCE
Impermanence
Change is the only form of permanence that exists—first glimpsed by ancient thinkers, and now woven into the fabric of modern science.
Classical Physics
Quote
What’s the difference between common ions and ionization in physics?
Ionization
None. Both describe the same process of atoms or molecules gaining or losing electrons.
Classical Physics
FAQ
Is cause and effect certain?
Causation versus Correlation
With the motion of life, cause and effect feel certain. We see stable patterns. But Hume reminds you, correlation does not guarantee causation.
Classical Physics
FAQ