Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
550nm*sqrt((1+(1.5*10^7 m/s)/speed of light)/(1-(1.5*10^7 m/s)/speed of light))
550nm*sqrt((1+(1.5*10^7 m/s)/speed of light)/(1-(1.5*10^7 m/s)/speed of light))
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random