Unit: Physical Science  Waves and Optics Grade Levels: 46 Connection To Curriculum: Science and Mathematics Teacher Prep Time: 1 hour Lesson Time Needed: 3.5 hours Complexity Moderate
20 ft rope
tape measure stopwatch adding machine tape set of red, green and violet pencils meter stick or ruler manila folder or cardstock 4 books 1 pair scissors diffraction grating paper tube (toilet paper roll) poster board 5 x 10 cm masking tape 2 razor blades Spectrum tubes (if possible) Doppler effect demonstrator OR plastic whiffle ball microswitch buzzer battery cord (3 m) 
Description
This lesson integrates a series of activities to introduce the measurement of waves. Activities guide the students to explore the relationship between frequency and wavelength and apply it to explain the Doppler effect.
Objectives
Students will:
• Explore the relationship between frequency and wavelength.
• Demonstrate the Doppler effect using sound and extend the concept to light.
• Use the frequencywavelength relationship and Doppler effect to explain NASA's research in astronomy.
Lesson Guide
Wave Measurements Lesson
[76KB PDF file]
Professional Development Training Module for This Lesson
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Lesson Activities and Sequence
The listed sequence leads students from the basic relationship between wavelength and frequency to its application in explaining the Doppler effect.

Wavelength and Energy
Students will be introduced to the relationship between frequency, energy and wavelength using a rope, tape measure and stopwatch. 
What's the Frequency, Roy G. Biv?
Students create a physical model comparing the wavelengths and frequencies of red, green and violet light on adding machine tape. 
Introduction to the Electromagnetic Spectrum
This fiveminute video helps reinforce the relationships found by the student teams with animations and physical data. 
Simple Spectroscope
Students build a simple spectroscope using a toilet paper tube and diffraction grating then use the scope to observe the spectra of different light sources and draw their observations on a provided worksheet. 
Red Shift, Blue Shift
In this culminating activity, students get a chance to apply their understanding of the relationship between wavelength and frequency to explain the Doppler effect, first in sound and then in electromagnetic waves.
Science as Inquiry
• Skills necessary to become independent inquirers about the natural world.
Physical Science
• Light, heat, electricity and magnetism.
History and Nature of Science
• Science as a human endeavor.
Common Core State Standards for Mathematics, NCTM
Number and Operations
• Understand the place value system.
• Generalize place value understanding for multidigit whole numbers.
Measurement and Data
• Convert like measurement units within given measurement system.
• Represent and interpret data.