2020-05-11
85
| Bandwidth, a second, the electromagnetic spectrum, waves, depending on, rippling waves, wavelength. |
1. For example, cellular phones are on the 800-900 megahertz bandwidth – that is, their _____ is 100 megahertz.
2. Thus, different technologies are best suited to different purposes, ______ the frequency range (bandwidth) they are in.
3. All radio signals, light rays, X-rays, and radioactivity radiate an energy that behaves like.
4. The basis for all telecommunications channels, both wired and wireless, is __________.
5. Frequency is the number of times a wave repeats (makes a cycle) in______.
6. _____ also vary according to their length – their wavelength.
7. At the high end, the waves are of high frequency and of short ______ (such as cosmic rays).
IV. Answer the questions:
1. What is the basis for wired and wireless communications channels?
2. What is called the electromagnetic spectrum?
3. What does the electromagnetic spectrum consist of?
4. Is the electromagnetic spectrum the range of all possible frequencies?
5. Do the waves vary according to the frequency and wavelength?
6. How does the electromagnetic spectrum extend?
7. What unit is frequency measured in?
8. How do we call the ranges of frequencies?
9. When can data be transmitted faster?
10. Can low-frequency waves carry much information?
11. Can high-frequency waves travel a far or short distance?
