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World 4 · Exam & Deep Optics · 6 min · PRO

Diffraction Gratings

Thousands of slits sharpen the pattern into orders

PRO · Light & Optics

World 4: Exam & Deep Optics is part of PRO

The first world of Light & Optics is free. PRO opens the other 43 lessons in 5 worlds — simulations, quizzes and all.

  • The Critical Angle
  • Total Internal Reflection
  • Fibre Optics
  • Prisms in Instruments
  • The Refracting Telescope
PRO includes
  • All 26 labs — every world, every lesson
  • Practice exams and certificates

$8.33/mo, billed yearly ($99.99) · or $39.99 monthly

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