Electromagnetic Spectrum Sum
Electromagnetic Spectrum
299,792,458 m/s – speed of light
186,282 mile/s
Speed of light = WL x Frequency
C=(^)(v)
Wavelength sa Electric field
Band Designations:
ELF- extreme low – 3-30hz
SLF- super – 30-300hz
ULF- ultra – 300hz-3khz
VLF – very – (Vice Versa)
LF – low
MF – medium
HF –
VHF –
UHF –
SHF –
EHF – 30-300ghz
Standard Frequency
JJY- japan – 40khz, 60khz
MSF – Rugby,England – 60khz,5km,3.1miles)
WWVB, Colorado,USA (60khz)
HBG – Switzerland (75khz)
DCF77 – main,Germany (77.5khz)
LORAN- longa range navigation – terrestrial navigation, low frequency
Radio transmitter – ship, aircraft
LORAN –C operates 90- 110 khz. Used: GPS
AM radio: 535khz -1.7mhz (1mhz=300m=328yards)
SW radio (5.9mhz to 26.1mhz)
Citizens Band radio ( 26.6mhz- 27.41 mhz) FM radio: 88-108mhz (98mhz=10ft)
Broadcast channels 3-83 have frequencies in the range from 45-885 MHz.
Channels 1-6: 45-83 MHz
Channels 7-13: 175-211 MHz
Channels 14-83: 471-885 MHz
Cellphones:
(PCS, TDMA, CDMA, GSM, GPRS, Cellular, Digital, Analog, etc.)
US carriers.
(1) 824 - 896 MHz
(2) 1.85 -1.99 GHz
Air traffic control (0.96- 1.215ghz)
GPS(Global Positioning System): 1.227-1.575ghz
WiFi (brandname) WLAN
2.4Ghz 802.11b,11g /5ghz 802.11a
Microwave Oven: 2.45ghz
Bluetooth: ISM band 2.4ghz, band divided 79channels (1mhz=1600t/s)
Quantum energy of microwave photons is in the range 0.00001 to 0.001 eV
Human body transparent to microwaves
Quantum States: Molecular rotation and torsion
Quantum million times lower than X-rays(ionizing radiation=damage)
Radio astronomy 30ghz – 1Thz
Infrared(IR)- “infra” – below, Region of spectrum, Below the visible red.
Used: Tracking, Night vision, remote controls
FarInfrared(FIR) – LF portion of IR, waves are thermal, penetrates skin cells
NearInfrared – Short wave lengths (TV’s Remote Control)
Quantum Energy of infrared photons range 0.001 to 1.7 eV
Quantum States: Molecular Vibrations
-absorbed more than microwaves, less visible light
Visible technologies
299,792,458 m/s – speed of light
186,282 mile/s
Speed of light = WL x Frequency
C=(^)(v)
Wavelength sa Electric field
Band Designations:
ELF- extreme low – 3-30hz
SLF- super – 30-300hz
ULF- ultra – 300hz-3khz
VLF – very – (Vice Versa)
LF – low
MF – medium
HF –
VHF –
UHF –
SHF –
EHF – 30-300ghz
Standard Frequency
JJY- japan – 40khz, 60khz
MSF – Rugby,England – 60khz,5km,3.1miles)
WWVB, Colorado,USA (60khz)
HBG – Switzerland (75khz)
DCF77 – main,Germany (77.5khz)
LORAN- longa range navigation – terrestrial navigation, low frequency
Radio transmitter – ship, aircraft
LORAN –C operates 90- 110 khz. Used: GPS
AM radio: 535khz -1.7mhz (1mhz=300m=328yards)
SW radio (5.9mhz to 26.1mhz)
Citizens Band radio ( 26.6mhz- 27.41 mhz) FM radio: 88-108mhz (98mhz=10ft)
Broadcast channels 3-83 have frequencies in the range from 45-885 MHz.
Channels 1-6: 45-83 MHz
Channels 7-13: 175-211 MHz
Channels 14-83: 471-885 MHz
Cellphones:
(PCS, TDMA, CDMA, GSM, GPRS, Cellular, Digital, Analog, etc.)
US carriers.
(1) 824 - 896 MHz
(2) 1.85 -1.99 GHz
Air traffic control (0.96- 1.215ghz)
GPS(Global Positioning System): 1.227-1.575ghz
WiFi (brandname) WLAN
2.4Ghz 802.11b,11g /5ghz 802.11a
Microwave Oven: 2.45ghz
Bluetooth: ISM band 2.4ghz, band divided 79channels (1mhz=1600t/s)
Quantum energy of microwave photons is in the range 0.00001 to 0.001 eV
Human body transparent to microwaves
Quantum States: Molecular rotation and torsion
Quantum million times lower than X-rays(ionizing radiation=damage)
Radio astronomy 30ghz – 1Thz
Infrared(IR)- “infra” – below, Region of spectrum, Below the visible red.
Used: Tracking, Night vision, remote controls
FarInfrared(FIR) – LF portion of IR, waves are thermal, penetrates skin cells
NearInfrared – Short wave lengths (TV’s Remote Control)
Quantum Energy of infrared photons range 0.001 to 1.7 eV
Quantum States: Molecular Vibrations
-absorbed more than microwaves, less visible light
Visible technologies