Wave Technology Uses Practice Test

The claim is incorrect because electromagnetic waves (like WiFi microwaves) travel about $3\times10^8,\text{m/s}$, much faster than sound in air

The claim is correct because sound waves travel at $3\times10^8,\text{m/s}$, much faster than light

The claim is correct because WiFi uses water waves, which are slow

The claim is incorrect because WiFi does not use waves at all; it uses only electric current in the air