Search results for query: *

I have a question on why that some wavelengths travel faster than other wavelengths when it is traveling down a fiber. I know when I turn up equipment for a fiber transmission system this comes into play that longer wavelengths are slower. I thought all light travels at around 3 E8 m/sec. So...

I want to use a 2N2222 transistor to switch on and of Christmas light using a microcontroller. The collector and emitter of the transistor is in series with the Christmas lights wire. The base of the transistor is connected to a 5 Volt output of a microcontroller. My question is do I need a...