Waves in communication Flashcards
1
Q
Bluetooth uses
A
- connects low power devices over short distances
e.g headphones, garage door opener
2
Q
Why is bluetooth good?
A
- highly immune to interference
-hardly any data loss - ensures a smooth and reliable wireless communication
- can pass through obstacles
- large wave
3
Q
Why is bluetooth bad?
A
- limited range
- connection becomes weak when device is far apart
- lower transfer speeds
- great at carrying data
4
Q
Infrared use
A
- used for thermal images and communication
- night vision
5
Q
Infrared disadvantages
A
- lower frequencies
- needs to be in direct line of sight with its receiver
- short transmission range
6
Q
Infrared advantages
A
-inexpensive tech
- limited range
-high frequency
- large bandwidth
7
Q
Satellite uses
A
- microwaves
- radio waves
- use different frequency length for up link and down link
8
Q
Satellite advantages
A
- can cover a large geographical area
- high bandwith and broadcast possibilities
9
Q
satellite disadvantages
A
- high cost
- signal can be spotty
- congestion of frequencies
- not always reliable
10
Q
Wifi use
A
- computers, smart phones, and an array of other devices
11
Q
Wifi advantages
A
- convenience, can connect many devices
- cost
- mobility, can connect from anywhere
- deployment, wifi can be placed anywhere
12
Q
Wifi disadvantages
A
- limited range
- limited bandwith use
- can be congested easily by multiple users
- slower and less reliable
13
Q
Mobile phones use
A
- mobile phones
- networks
