2nd Quarter Science (W2- Practical Applications of EM Waves) Flashcards
1
Q
Give 2 practical applications of Radio Waves
A
Bluetooth and Wifi
2
Q
- Longest wavelengths (10^4m - 10^1m)
- Shortest frequencies (30kHz to 3000 Mhz)
- Most usable in communication devices
A
.Radio Waves-
3
Q
- Short wavelength (1mm-30cm) with high frequency (1-1000 Ghz)
- Lies between Radio wave and infrared
- Used for communication
A
Microwaves-
4
Q
Give 2 practical applications of Microwaves
A
Microwaves, signal
5
Q
- Frequency (3x10^11 - 4x10^14 Hz) and Wavelength (7.5x10^-7 - 10^-3m)
- Means “below red”
- Lies between the microwave region and the low frequency edge of the visible spectrum
- Used to determine the temperature of an object
A
Infrared Radiation-
6
Q
Give 2 practical applications of Infrared Radiation-
A
night vision alarm systems
7
Q
- Visible to human eye (LCD, Monitor)
- Wavelength (4x10^-7 - 8x10^-7m) and Frequency (4x10^14 - 8x10^14 Hz)
A
Visible light-
8
Q
Give 2 practical applications of Visible light-
A
Traffic light, television
9
Q
Give 2 practical applications of Ultraviolet-
A
For crime scene
Sterilization
10
Q
- Shorter wavelength than visible light but long than x-ray
- Means “above violet”
- Produced by high temperature surface
A
Ultraviolet-
11
Q
Give 2 practical applications of X-rays (x-radiation)-
A
To detect abnormalities in the skeletal system
Used in dental imaging
12
Q
- High energy waves
- Have great penetrating power and use for medical application
- Lies beyond UV
A
X-rays (x-radiation)-
13
Q
Give 2 practical applications of Gamma ray-
A
Used to detect cracks in metal
Used in radiotheraphy
Sterilized equipment
14
Q
- More penetrating than x-rays
- Used to treat some types of cancer
- It kills negative and healthy cells
- Radioactive elements such as cobalt-60 and cesium-137
A
Gamma ray-
