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# Doppler effect

## The Doppler effect

### Listen to the Doppler effect! A passing car beeps its horn

Doppler effect Acela express train

Doppler effect racetrack

The Big Bang Theory – The Doppler Effect

### Watch the spacing of the sound waves, when the car is at rest, and when it is in motion. How does motion change the spacing of the waves?

http://www.acs.psu.edu/drussell/Demos/doppler/doppler.html

## MCAS problems

By the end of our unit on waves we should be able to do MCAS Physics exam: sample wave problems

## Learning Standards

2016 Massachusetts Science and Technology/Engineering Curriculum Framework

HS-PS4-1. Use mathematical representations to support a claim regarding relationships among the frequency, wavelength, and speed of waves traveling within various media. Recognize that electromagnetic waves can travel through empty space (without a medium) as compared to mechanical waves that require a medium

SAT subject test in Physics: Waves and optics

• General wave properties, such as wave speed, frequency, wavelength, superposition, standing wave diffraction, and Doppler effect
• Reflection and refraction, such as Snell’s law and changes in wavelength and speed
• Ray optics, such as image formation using pinholes, mirrors, and lenses
• Physical optics, such as single-slit diffraction, double-slit interference, polarization, and color