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Science · Grade 11

Sound and Light as Physical Phenomena

Learners apply the wave model to sound and light. They relate loudness to intensity with the inverse-square law and the decibel scale, explain the Doppler effect, use c = fλ across the electromagnetic spectrum, calculate refraction with Snell's law and explain total internal reflection, and predict images formed by converging lenses with ray rules and the lens equation.

  • 4 lessons
  • About 120 minutes
  • Sound and light check: 10 questions
  • Ways to answer: choose an answer, plot points, match pairs, type a number, put in order and sort into groups
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What learners will discover

  • Explain sound as a longitudinal pressure wave, relate pitch to frequency and loudness to intensity, and use the inverse-square law and the decibel scale.
  • Explain the Doppler effect for moving sources and describe its uses in technology and astronomy.
  • Use c = fλ across the electromagnetic spectrum, calculate refraction with n = c/v and Snell's law, and explain total internal reflection.
  • Predict the images formed by a converging lens with ray rules and the lens equation, including magnification.

Lessons

  1. Sound: pitch, intensity and decibels 7 steps4 practiceabout 30 min
  2. The Doppler effect 5 steps2 practiceabout 24 min
  3. Light: the spectrum and refraction 7 steps5 practiceabout 33 min
  4. Lenses and images 7 steps5 practiceabout 33 min
  5. Sound and light check 10 questions at the end

Keep exploring

More 11th grade science

Guide for grown-ups