Lesson 1  Properties of Waves and Light
Overview:
In this activity, you will begin by reviewing some of the properties of waves. Then will begin to study ray optics with reflections.
Curriculum Expectations:
Overall Expectations:
E2. Investigate, in qualitative and quantitative terms, the properties of waves and light, and solve related problems.
Specific Expectations:
E2.1 Use appropriate terminology related to the wave nature of light, including, but not limited to: diffraction, dispersion, wave interference, nodal line, phase, oscillate, polarization, and electromagnetic radiation.
E2. Investigate, in qualitative and quantitative terms, the properties of waves and light, and solve related problems.
Specific Expectations:
E2.1 Use appropriate terminology related to the wave nature of light, including, but not limited to: diffraction, dispersion, wave interference, nodal line, phase, oscillate, polarization, and electromagnetic radiation.
Success Criteria:
 What is a wave?
 If you oscillate a string, do the points on the wave move horizontally?
 Draw how a moving wave as viewed from above.
 Draw a y vs. x graph for a transverse wave and label the crest, trough, wavelength, and amplitude.
 Draw a y vs. t graph for a transverse wave and label the amplitude and period.
 Derive the universal wave equation.
 What is ray approximation?
 Describe the law of reflection using a diagram that includes the following labels: normal, angle of incidence, and angle of reflection.
Time Allocation: 2 hours
Learning A
ctivities:Read pages 440  442 from Nelson 9.1
Wave on a String
Watch a string vibrate in slow motion. Wiggle the end of the string and make waves, or adjust the frequency and amplitude of an oscillator. Adjust the damping and tension. The end can be fixed, loose, or open. 

In the playlist below, video:
 Will explain the basics of mechanical waves.
 Will explain and develop equation 1 of the (wave train) wave equation.
 Will introduce the concepts of light reflections and show you how to find the angle between the inbound and exit ray.
Task:
Solve questions 5, 6, 9, 11, 13, 16, and 20 from Nelson 9.1 Review on page 443.
Reflect:
Most students confuse the definition of a what a wave is, how has this section changed the way you think about waves?