Loading courses…
Telecom Foundations
Radio frequency refers to electromagnetic waves oscillating between 3 kHz and 300 GHz, the portion of the spectrum used for all wireless communication. These waves are fundamentally the same phenomenon as visible light, infrared heat, and X-rays, differing only in frequency. RF waves travel at the speed of light and can carry information by modulating their amplitude, frequency, or phase. Every wireless technology you use daily, from cellular networks and WiFi to Bluetooth and GPS, relies on RF energy propagating through free space to deliver data without physical wires.
Try these first, even if you're not sure. Guessing primes your brain.
Shouting across a field lags. A phone call does not. How much faster is radio?
A microwave oven can jam your WiFi. Why would a kitchen appliance matter?
A flashlight and a car radio both use "invisible waves." How are they related?
Answer all 3to continue — it's OK to be wrong.