[00:00]	Waves and Light
[00:01]	Energy, Frequency, and Wavelength
[05:41]	Relating Energy to Wavelength
[06:14]	Energy, Frequency, and Wavelength (reprise)
[06:53]	Relating Energy to Wavelength (reprise)
[07:15]	Energy, Frequency, and Wavelength (reprise)
[13:17]	Atmospheric Transmission
[14:31]	Radio Pollution
[16:14]	Energy, Frequency, and Wavelength (reprise)
[17:44]	Ocean Waves
[18:08]	Waves in Motion
[21:50]	Changing the Wavelength
[22:05]	Changing the Amplitude (Height)
[22:37]	Energy, Frequency, and Wavelength (reprise)
[29:38]	Resonance I.
[30:20]	Resonance II.
[32:28]	Resonance III.
[34:04]	Energy, Frequency, and Wavelength (reprise)
[39:50]	Relating Energy, Frequency, and Wavelength

Learning Objectives

1. Understand the concept of a wave, and describe common examples of wavelike behavior found in nature:
   • The wave pattern caused by fans raising and lowering their arms in concert in a soccer stadium
   • Sound waves moving through the air, or earthquake waves moving through the ground
   • Music, where varying the length of a string or the length of a pipe produces a change in pitch
   • Ocean waves, crashing up on the shore with a certain rhythm
   • The wavelike pattern of a child's swing, moving forward and backward

2. Visualize the major regimes along the electromagnetic spectrum, and connect them to our daily lives.
   • Gamma-rays (high energy, emitted by unusual distant objects called gamma-ray bursters)
   • X-rays (ideal for photographing bones underneath muscle)
   • Ultraviolet radiation (emitted by the Sun, harmful to humans)
   • Optical light (transmitted by our atmosphere, ideal for our eyes)
   • Infrared heat (not visible, perceived as heat)
   • Radio waves (low energy, where human technology pollutes the extragalactic sky)

3. Comprehend how to characterize a wave by its energy, its frequency, its wavelength, or its color.
   • Relate energy to frequency, frequency to wavelength, wavelength to color, and suchlike.
   • Understand the effect of increasing the amount of energy per photon in a beam of light.
   • Contrast with the effect of increasing the number of photons in a beam of light.
   • Realize that though light can have different frequencies, it always travels at the same speed.

4. Visualize the effects of driving a system (a bridge, or a child's swing) at its resonant frequency.