Question

question 17 of 25
what happens when you call someone using your cell phone?
a. a system of satellites orbiting earth receives the microwave signals and sends them to the person you are calling.
b. microwaves reach a cell tower, then fiber optic cables send the signal to a cell tower near the person you are calling.
c. microwaves travel from your cell phone directly to the cell phone of the person you are calling.
d. sound waves reach a cell tower, then fiber optic cables send the signal to a cell tower near the person you are calling.

Explanation:

• Option A: Cell - phone calls do not rely on satellite systems for the basic connection between two nearby cell - phone users. Satellites are more for global or remote - area communications.
• Option B: When you make a call, your phone sends microwave signals to a local cell tower. Then, fiber - optic cables (which are part of the telecommunications infrastructure) send the signal to a cell tower near the recipient. This is the correct process.
• Option C: Microwaves from one cell phone do not travel directly to another cell phone over long distances. Cell towers are intermediaries.
• Option D: It is microwave signals (not sound waves) that are sent from the phone to the cell tower. Sound waves are converted to electrical signals (and then to microwave signals) in the phone.

Answer:

B. Microwaves reach a cell tower, then fiber optic cables send the signal to a cell tower near the person you are calling.