Question

Donald's living room is home to a wireless internet router, a television, an FM radio, and the family's cell phones. How do all of the devices still work while in the same room?

a) Each type of device uses waves of different amplitudes, so there is no interference.
b) Only the router receives its signals over the air, so there is no interference.
c) Each type of device uses waves of different frequencies, so there is no interference.
d) Only the television receives its signals over the air, so there is no interference.

Answer 1

Donald's devices work without interference because they use different frequencies, which are regulated to prevent cross-talk among devices.

Step-by-step explanation:

The devices in Donald's living room are able to operate without interference because each type of device uses waves of different frequencies. This means that the wireless internet router, television, FM radio, and cell phones each transmit and receive information on separate designated frequency bands, effectively avoiding cross-talk and interference with one another's signals. Regulatory bodies ensure these frequencies are allocated such that overlapping does not occur. While amplitude modulation (AM) and frequency modulation (FM) are ways signals can be varied, these methods relate more to how the signal is encoded rather than how interference is prevented.