Mobile phone Essay | Essay

This student essay consists of approximately 3 pages of analysis of Cell Phones in Subways.
This section contains 705 words
(approx. 3 pages at 300 words per page)
Buy the Student Essay on Cell Phones in Subways

Cell Phones in Subways

Summary: Essay discusses why cell phones do not work in a subway.
Electromagnetic waves

Why don't cell phones work in subways or subway tunnels?

Ever wonder why that when you walk into a subway tunnel your connection just shuts off. Well read this passage to find out. To fully understand the experiment you must first know what a cell phone is. Cell phones are actually a kind of small radio; they use a special kind of waves called radio waves. Radio waves are part of the electromagnetic spectrum. First let me explain what a wave is. A wave is a wave of energy having a frequency within the electromagnetic spectrum. For cell phones to work the people that are talking must be connected via antenna.

The antennas have different wave frequencies so that only the person that you want to talk to is on the line. (Ex. Frequencies are sort of like chat rooms, if you are in a private...

(read more)

This section contains 705 words
(approx. 3 pages at 300 words per page)
Buy the Student Essay on Cell Phones in Subways
Copyrights
BookRags
Cell Phones in Subways from BookRags. (c)2020 BookRags, Inc. All rights reserved.