Car at rest | Moving Car

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The headlights of your physics professor's yellow Lamborghini are sodium vapor lamps. You can measure the wavelength of the light (in nm) by clicking in the animation. When you stand in front of the car as it sits still, the lights appear to be a bright yellow color. Restart.

1. With what speed is the car moving if you observe the spectra from the headlights of the moving car?
2. In which direction (relative to you) is the car moving?