Physics & chemistry · A guided course

Light and waves

Turn patterns of light into evidence about places we cannot touch.

Follow waves from familiar water and sound to invisible light, telescope optics, and stellar spectra. Practice deciding what a measurement reveals—and what it leaves unresolved.

6 lessons48 min of lessons + 6 min challengeBeginner to Intermediate

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Suggested preparation is listed in the course · Start whenever you’re ready

NASA/JPL-Caltech/UCLA · Image source ↗

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Learning points

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Correct answer: +10
Lesson complete: +25
All lessons complete: +100
Final challenge: +50

Earn each reward once. Retries never cost points.

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Inside this course

6 lessons

Each lesson builds on the last. Read the story, explore the sources, and check your understanding.

0 of 6 lessons complete

— / 530 pointsEarned in this course

Put it all togetherThe light and waves challenge5 questions · 6 min · Final review

No account is needed to learn. Your correct answers keep their earned rewards.

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