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Sonora Run - Sunday June 9, 2024

Your Host(s) for the Event: Paige Lane Route: https://maps.app.goo.gl/tGNYaz7VcvVDeXPLA Download the map for off-line use  - in case we lose...

Bumper Sticker For Physicists

According to About.com:
A light source moving away from the listener (v is positive) would provide an fL that is less than fS. In the visible light spectrum, this causes a shift toward the red end of the light spectrum, so it is called a red shift. When the light source is moving toward the listener (v is negative), then fL is greater than fS. In the visible light spectrum, this causes a shift toward the high-frequency end of the light spectrum. For some reason, violet got the short end of the stick and such frequency shift is actually called a blue shift. Obviously, in the area of the electromagnetic spectrum outside of the visible light spectrum, these shifts might not actually be toward red and blue. If you're in the infrared, for example, you're ironically shifting away from red when you experience a "red shift."
That explains it, right?

[Photo Credit: Jonathan Turley]