The Electromagnetic Spectrum

Pulsed Power Home Applet Index Info Index

entire  visible  infrared

 

 The Entire Electromagnetic Spectrum

Designation

Frequency Range

Wavelength Range

Lower

Upper

Lower

Upper

ULF

none

30 Hz

10 Mm

none

VF

30 Hz

300 Hz

1 Mm

10 Mm

ELF

300 Hz

3 kHz

100 km

1 Mm

VLF

3 kHz

30 kHz

10 km

100 km

LF

30 kHz

300 kHz

1 km

10 km

MF

300 kHz

3 MHz

100 m

1 km

HF

3 MHz

30 MHz

10 m

100 m

VHF

30 MHz

300 MHz

1 m

10m

UHF

300 MHz

3 GHz

10 cm

1 m

SHF

3 GHz

30 GHz

1 cm

10 cm

S

2.6

3.95

7.6

11.5

G

3.95

5.85

5.1

7.6

J

5.3

8.2

3.7

5.7

H

7.05

10.0

3.0

4.25

X

8.2

12.4

2.4

3.7

M

10.0

15.0

2.0

3.0

P

12.4

18.0

1.67

2.4

K

18.0

26.5

1.1

1.67

R

26.5

40.0

0.75

1.1

EHF

30 GHz

300 GHz

1 mm

1 cm

Submillimeter

300 GHz

3 THz

100 mm

1 mm

Infrared

3 THz

430 THz

700 nm

100 mm

Visible

430 THz

750 THz

400 nm

700 nm

Ultraviolet

750 THz

30 PHz

10 nm

400 nm

X Ray

30 PHz

3 EHz

100 pm

10 nm

Gamma Ray

3 EHz

none

none

100 pm

Source:  NRL Plasma Formulary

Notes: 

     The boundary between ULF and VF (voice frequencies) is variously defined.

     The SHF (microwave) band is further subdivided approximately as shown.

  

The Visible Spectrum

Color

Wavelength Range [nm]

 

lower

upper

Red

630

780

Orange

590

630

Yellow

560

590

Green

490

560

Blue

450

490

Violet

380

450

 

 

The Infrared Spectrum

Band

Wavelength Range [mm]

 

lower

upper

NIR (near IR)

0.7

2.0

MIR (mid IR)

2.0

25

FIR (far IR)

25

1000

Source:  http://scienceworld.wolfram.com/chemistry/InfraredSpectroscopy.html