Question

A Wi-Fi hotspot is an area with an accessible wireless network. The term is most often used to refer to wireless networks in public areas like airports and coffee shops. Some are free and some require fees for use, but in either case they can be handy when you are on the go. Just like cellphones and televisions, wi-fi works by utilizing ______________ to transmit signals and data. A) radio waves B) microwaves C) ultraviolet rays D) infrared waves

Answer 1

Cellular telephone service, television, garage-door openers, toy walkie-talkies, RC model airplanes and boats, taxi communication, ambulance communication, police communication, fire communication, cordless telephones, wireless headphones, 'microwave' ovens, and Bluetooth stuff, all radio waves to transmit and receive their signals.

None of these use 'microwaves' ... not even 'microwave' ovens.  'Microwave' is a label for radio at frequencies above 3 GHz, and none of these things operate at frequencies that high. Bluetooth and microwave ovens operate around 2.45 GHz.

Wi-Fi has one set of channels around 2.4 GHz ... radio waves but not microwaves.  Wi-Fi also has another set of channels around 5 GHz ... radio waves that can properly also be called 'microwaves'.

Some TV remotes use infrared waves to communicate with the TV set.

We don't (yet ?) manufacture anything that uses ultraviolet rays, X-rays, or gamma rays for communication.  Even if we knew how, these forms of radiation are too dangerous to go shining them around all over the place where people are.

 

Answer 2

Answer:

A) radio waves

Explanation:

Wi-Fi is inside the range of radio waves range in the electromagnetic spectrum, just like cellphones and televisions. Basically, this radio waves are the ones that carry all the information through out wifi, just like cellphones calls or messages.

So, basically, radio waves are the medium to transmit signals and data that we call Wi-Fi.

Therefore, the answer is A.