Deepermind Metric Units

Updated October 24 2013
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Prefix

Symbol

10n

US English Term

Decimal

 

yotta

Y

 1024

septillion

1 000 000 000 000 000 000 000 000

 

zetta

Z

 1021

sextillion

1 000 000 000 000 000 000 000

 

exa

E

 1018

quintillion

1 000 000 000 000 000 000

 

peta

P

 1015

quadrillion

1 000 000 000 000 000

 

tera

T

 1012

trillion

1 000 000 000 000

 

giga

G

 109

billion

1 000 000 000

 

mega

M

 106

million

1000 000

 

kilo

k

 103

thousand

1 000

 

*hecto

h

 102

hundred

100

 

*deca

da

 101

ten

10

 

(unity)

(none)

100

one

1

 

*deci

d

 10−1

tenth

0.1

 

*centi

c

 10−2

hundredth

0.01

 

milli

m

 10−3

thousandth

0.001

 

micro

µ

 10−6

millionth

0.000 001

 

nano

n

 10−9

billionth

0.000 000 001

 

pico

p

 10−12

trillionth

0.000 000 000 001

 

femto

f

 10−15

quadrillionth

0.000 000 000 000 001

 

atto

a

 10−18

quintillionth

0.000 000 000 000 000 001

 

zepto

z

 10−21

sextillionth

0.000 000 000 000 000 000 001

 

yocto

y

 10−24 

septillionth

0.000 000 000 000 000 000 000 001

 

*Note: Not based 1000x intervals.

Prefix

Symbol

US English Term

Established

yotta

Y

septillion

1991

zetta

Z

sextillion

1991

exa

E

quintillion

1975

peta

P

quadrillion

1975

tera

T

trillion

1960

giga

G

billion

1960

mega

M

million

1960

kilo

k

thousand

1795

*hecto

h

hundred

1795

*deca

da

ten

1795

(unity)

(none)

one

ancient

*deci

d

tenth

1795

*centi

c

hundredth

1795

milli

m

thousandth

1795

micro

µ

millionth

1960

nano

n

billionth

1960

pico

p

trillionth

1960

femto

f

quadrillionth

1964

atto

a

quintillionth

1964

zepto

z

sextillionth

1991

yocto

y

septillionth

1991

Also see this web page for more examples.

Prefix

Symbol

10n

US English Term

Length

  

yotta

Y

 1024

septillion

Visible universe 43 Ym  

zetta

Z

 1021

sextillion

Our Milky Way Galaxy  1 Zm  

exa

E

 1018

quintillion

Distance to nearest stars 1 Em  

peta

P

 1015

quadrillion

Light year 9.46 Pm  

tera

T

 1012

trillion

Across the orbits of the outer planets 10 Tm  

giga

G

 109

billion

Distance to the sun 150 Gm  

mega

M

 106

million

Earth to Moon 384 Mm;  Diameter of Earth 12.7 Mm; Circumference of the Earth 40 Mn; Distance across USA  3.93 Mm

  

kilo

k

 103

thousand

Mt. Everest above sea level 8.85 km; Marathon 42 km  

*hecto

h

 102

hundred

Sprint track race 100 m  

*deca

da

 101

ten

City block about 80 m; Football field 91.7 m; Oak tree 10 m  

(unity)

(none)

100

one

 Man 1.8 m  

*deci

d

 10−1

tenth

Hand 1  

*centi

c

 10−2

hundredth

Finger nail, dime about 1 cm or 100 mm  

milli

m

 10−3

thousandth

Tip of a pencil 1 mm  

micro

µ

 10−6

millionth

White blood cell 100 µm

  

nano

n

 10−9

billionth

DNA 2.5 nm  

pico

p

 10−12

trillionth

Atoms  62 to 520 pm

 

femto

f

 10−15

quadrillionth

Proton 1 fm  

atto

a

 10−18

quintillionth

Quark 100 am; Unknown < 10 am  

zepto

z

 10−21

sextillionth

Unknown  

yocto

y

 10−24 

septillionth

Unknown

 

 

Electromagnetic Spectrum

Item

Wavelength

 

Frequency

 

Gamma radiation

 < 10 pm  

  > 10 EHz

  
X Rays

 10 pm - 10 nm

  

30 PHz - 30 EHz

  
Vacuum Ultraviolet 40 -190 nm   1.57 - 7.5 PHz extreme > 100 nm
Ultraviolet UVC

220 -290 nm

  1.07 PHz - 3.0 PHz far 190 - 220 nm germicidal totally absorb by atmosphere
Ultraviolet UVB 290 - 320 nm   952 THz - 1.07 PHz middle 200 - 300 nm destructive sunburn
Ultraviolet UVA 320 - 400 nm   315 - 750 THz near 300 -400 nm tanning
Violet

400 - 424 nm

   707 - 750 THz Ref: Physics Hypertextbook
Blue

424 - 491 nm

  

610 - 707 THz
Green

491 - 575 nm

  

521 - 610 THz
Yellow

575 - 585 nm

512 - 521 THz
Orange

585 - 647 nm

  

463 - 512 THz
Red

647 - 700 nm

  

428 - 463 THz
Near Infrared

750 nm –1.4 µm

   214 - 400 THz

Defined by the water absorption, and commonly used in fiber optics, night vision goggles, TV clickers. Digital camera can see into this spectrum.
Short Wave Infrared

1.4-3 µm

  

214 - 100 THz

Water absorption occurs  band 1.45 µm.  Fiber optics band 1.53 to 1.560 µm 
Mid Wave Infrared

3–8 µm

   100 - 37.4 THz

Atmospheric window used for heat seeking guided missile 3–5 µm

Long Wave Infrared

8–15 µm

   19.9 - 37.4 THz

Thermal Infrared Region. Radiation from objects slightly warmer than room temperature such as human bodies.  Used by Forward-looking infrared (FLIR) systems.
Far Infrared

15–1,000 µm

   3.00 - 19.7 THz

Cool objects (5 K and 340 K) radiation. Used to observe interstellar gases such as M82.
Microwave
Submillimeter

100 µm - 1 mm

  

300 GHz - 3000 GHz

  
Extreme EHF 1 - 10 mm   30            - 300 GHz  
Super SHF microwave 10 -100 mm   3              - 30 GHz  
Ultra High Freq.  UHF 100  mm - 1 m   300 MHz - 3 GHz Microwave Oven 122 mm, 2.45 GHz

Very High Freq.  VHF

 1 - 10 m   30            - 300 MHz Microwave low end 1 m, 300 MHz

High Freq.  HF

 10 - 100 m   3              - 30 MHz  
Medium MF 100 km - 1 Mm   300 kHz  - 3 MHz  
Low Freq. LF 1 - 10 km   30            - 300 kHz  
Very Low Freq. VLF 10 -100 km   3               - 30 kHz  
Extreme Low Freq. ELF 100 - 3 Mm   100 Hz     - 3 KHz  
Ultra Low Freq. ULF > 3 Mm   <100 Hz  
2 Meter Ham Band 2 m   149 MHz  
TV Channel 2 USA 5.55 m   54 MHz  

TV Channel 6 USA

 3.65 m   82 MHz  

TV Channel 7 USA

 1.72 m   174 MHz  

TV Channel 13 USA

 1.42 m   210 MHz  

TV Channel 14 USA

 0.63 m   470 MHz  

TV Channel 83 USA

 0.34 m   884 MHz  
FM Radio USA 2.77 - 3.41 m   88 - 108 MHz  
Short Wave HF 9.99  - 176 m   1.7 - 30 MHz  
AM Broadcast Band (USA) 176 - 555 m   540 - 1.7 MHz  
WWVB 5.00 km   60 KHz  
AC Current 5.00 Mm   60 Hz 3.09 K Miles

Radio Allocations


George Norwood
Based on Wikipedia and other sources.
KE5KDO
Contact deepergeorge@hotmail.com
972 644-2911 
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