Infrared vs Ultraviolet | Difference between IR and UV
This page compares Infrared (IR) vs Ultraviolet (UV) and mentions difference between IR and UV based on frequency, wavelength, range, advantages and disadvantages.
IR (Infrared)
• Wavelength : 760 nm to 1 mm
• Communication distance : Short and medium ranges in LiFi and OCC
• Advantages: It is not visible for human eye
• Disadvantages: It is not always safe for human. LOS communication and
very limited low data rate NLOS communication using reflection of infrared waves.
• Applications : LiFi, OCC (Optical Camera Communication), FSO (Free Space Optical) communication, LiDAR
Following table mentions sub bands of IR (Infrared) with its frequency and wavelength values.
| IR Sub Bands | Frequency | Wavelength |
|---|---|---|
| Far Infrared (FIR) | 0.3 to 20 THz | 1 to 0.015 mm |
| Long Wavelength Infrared (LWIR) | 20 to 37.5 THz | 0.015 to 0.008 mm |
| Mid Wavelength Infrared (MWIR) | 37 to 100 THz | 0.008 mm to 0.003 mm |
| Short Wavelength Infrared (SWIR) | 100 to 214.3 THz | 3000000 to 1400 nm |
| Near Infrared (NIR) | 214.3 to 394.7 THz | 1400 to 760 nm |
Ultraviolet (UV)
• Wavelength : 10 to 400 nm
• Communication distance : Short and medium ranges in LiFi
• Advantages : High data rate NLOS communication is possible, Not visible for human eye.
• Disadvantages : Not safe for human
• Applications : LiFi, FSO
Following table mentions sub bands of UV (Ultraviolet) with its frequency and wavelength values.
| UV sub bands | Frequency | Wavelength |
|---|---|---|
| Ultraviolet A (UVA) | 750 to 952.4 THz | 400 to 315 nm |
| Ultraviolet B (UVB) | 952.4 to 1071 THz | 315 to 280 nm |
| Ultraviolet C (UVC) | 1.071 to 3 PHz | 280 to 100 nm |
| Near Ultraviolet (NUV) | 0.750 to 1 PHz | 400 to 300 nm |
| Middle Ultraviolet | 1 to 1.5 PHz | 300 to 200 nm |
| Far Ultraviolet | 1.5 to 2.459 PHz | 200 to 122 nm |
| Hydrogen Lyman-alpha | 2.459 to 2.479 PHz | 122 to 121 nm |
| Extreme ultra violet (EUV) | 2.479 to 30 PHz | 121 to 10 nm |
| Vacuum ultraviolet | 1.5 to 30 PHz | 200 to 10 nm |
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