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electromagnetic spectrum

wavelength- and frequency bands

wavelengths from infrared to ultraviolet

extralight/sunshine/ electromagnetic spectrum

wavelength- and frequency bands
Electromagnetism is a common denomination for a group of related forms of energy that share the characteristic that no medium is required for their propagation. All manifestations of electromagnetism therefore exist in space in smaller of larger quantities. The physical characteristics of the different types of electromagnetic radiation

Type

Wavelength

Frequency

electric waves

30 Hz - 30 KHz

radio waves

10 km - 10 cm

30 KHz - 3 GHz

micro waves

10 cm - 100 µm

3 GHz - 3 THz

infrared radiation

100 µm - 700 nm

light

700 - 380 nm

ultraviolet radiation

380 - 10 nm

X-rays or Röntgen radiation

10 nm - 100 pm

Y-rays or gamma radiation

100 - 0,1 pm

cosmic radiation

< 0,1 pm

from infrared to ultraviolet
In and around the visible part of the spectrum the classification is arbitrary as well. Notice that in the infrared- and ultraviolet areas different simultaneously used subdivisions exist.

Type

Wavelength

far infrared (IR-C)

100 - 15 µm

middle infrared (IR-B)

15 - 1,4 µm

near infrared (IR-A)

1,4 µm - 700 nm

solids infrared

35 - 15 µm

thermal infrared

30 - 3 µm

red light

700 - 640 nm

orange light

640 - 600 nm

yellow light

600 - 555 nm

green light

555 - 485 nm

blue light

485 - 430 nm

violet light

430 - 380 nm

near ultraviolet

380 - 200 nm

vacuum ultraviolet

200 - 10 nm

UV-A or chemical radiation

400 - 315 nm

UV-B or Dorna radiation

315 - 280 nm

UV-C

280 - 100 nm

primarily depend on their frequency or wavelength. The exact classification of the different wavelength- and frequency bands, as well as the upper and lower limits of the electromagnetic spectrum itself, is rather arbitrary. In many tables for instance, electric waves and cosmic radiation are not mentioned as part of the electromagnetic spectrum. All bands show some overlap and there is no widely accepted standardisation. The subjoined table is therefore only an indication. Notice the fact that radiation with a wavelength longer than about ten meters is mostly characterised by its frequency while radiation with a frequency above ten GigaHertz is more often characterised by its wavelength.

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© copyright 2005-2010 - extralight.info
v3.16

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healing radiation
The overview of acknowledged- or supposed healing radiation as listed below is indicative and incomplete. Consult your physician or at least read the instruction manual of your light source, your heat-lamp or your sun-lamp carefully before deciding to apply it for any therapeutic purpose.

healing radiation

Type

Wavelength

Application

mid infrared

10600 nm

soft tissue laser surgery.

mid infrared

2940 nm

hard tissue laser surgery.

near infrared

1450, 1320 and 1064 nm

fights nail fungus, reduces acne scars (laser applications).

near infrared

1400 - 1000 nm

relieves pain.

near infrared

1000 - 800 nm

stimulates wound healing.

infrared
/green

1064 - 488 nm

laser hair removal.

near infrared
/orange-red

780 - 620 nm

fights skin cancer in combination with photosensitisers (PDT)

red

700 - 670 nm

fights smallpox.

red

670 - 650 nm

stimulates tissue production, supports treatment of acne.

red

700 - 640 nm

improves metabolism
and blood circulation.

orange

640 - 600 nm

stimulates the
appetite, enhances
spirit.

yellow

600 - 555 nm

reduces
depressiveness.

green

555 - 485 nm

affords mental relief.

blue

485 - 430 nm

relieves pain,
decreases blood
pressure.

yellow

595 - 585 nm

stimulates healing of postoperative wounds.

blue

485 - 460 nm

fights SAD (Seasonal Affective Disorder).

blue

460 - 455 nm

fights neonatal jaundice.

green

532 nm

laser prostate surgery (PVP).

violet

420 - 405 nm

fights acne.

ultraviolet A

400 - 320 nm

fights psoriasis in combination with psoralen (PUVA), fights skin-tuberculosis, gives a superficial tan, reduces inflammation.

ultraviolet B

320 - 290 nm

fights rachitis, reinforces the bone structure, fights psoriasis, fights eczema, gives a deep tan.

ultraviolet A/B/C

337 - 126 nm

laser eye surgery (LASIK).

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mood affection