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Light is a wave
Lumen · High school
Huygens' Treatise: light spreads by spherical waves. A candle is many centres. Iceland spar is the hard middle, still drawable.
Student age
10years · 5th grade
Lumen · High school
Huygens' Treatise: light spreads by spherical waves. A candle is many centres. Iceland spar is the hard middle, still drawable.
Student age
10years · 5th grade