NS 1300 Dr. Hoge. Is the invisibility cloak real? How does it work?

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Presentation transcript:

NS 1300 Dr. Hoge

Is the invisibility cloak real? How does it work?

Waves A wave is a wiggle in time

Characteristics of Waves Wavelength Amplitude Frequency Velocity ( remember, velocity includes the vector and magnitude )

Longitudinal Waves Sound P waves

Acoustics Interference Resonance Doppler Effect Volume (amplitude of the wave) Pitch (frequency)

So, how do speakers work?

Transverse Waves The electromagnetic spectrum S waves

The Electromagnetic Spectrum Gamma Rays Cosmic Rays X-Rays Ultraviolet Radiation Visible Light Spectrum Infrared Radiation Microwaves Radio Waves

Electromagnetic Waves Wave / Particle Duality

Light The speed of light is a constant – c Color Red Shift / Blue Shift

Properties of Light ( and other waves ) Transmission Reflection Refraction Interference Resonance Polarization

Lenses Concave Lenses Convex Lenses Focal Point

Photoelectric Effect Photons and electrons are quantum particles

So, how does my TV work? How about night vision goggles?

The Human Eye

Quiz 1. T or F, a wave is a wiggle in time. 2. T or F, all waves require a medium to travel through. 3. T or F, refraction is the bending of a wave. 4. T or F, a concave lens makes objects look bigger. 5. T or F, the photoelectric effect occurs when a flow of electrons is used to create light.