Trading Cards

1842
Doppler Effect for Sound and Light
Waves
When a source moves toward you, waves compress and frequency increases; when it moves away, waves stretch and frequency decreases. This applies to sound (changing pitch), and light (changing color, or redshift).
Physics
Story 
“Everything is in flux.”
Impermanence
Change is the only form of permanence that exists—first glimpsed by ancient thinkers, and now woven into the fabric of modern science.
Physics
Quote 
Could the CMB be proof of an inifinite universe?
Big Bang
The Cosmic Microwave Background isn’t the edge of space in an infinite universe—it’s the oldest light we can see, marking a boundary in time, not distance.
Physics
FAQ 
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