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Metric Prefixes

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Value:Prefix:Pron:Symbol:

1018exaex aE

1015petapet aP

1012teratare aT

109gigajig aG

106megameg aM

103kilokey lok

102hectohek toeh

10dekadek ada

Value:Prefix:Pron:Symbol:

10-1decidec id

10-2centicent Ic

10-3millimill Im

10-6micromy kro

10-9nanonan o

10-12picopec o

10-15femtofem tof

Frequencies and Wavelengths

f: (Hz):(m)Relevant Dim:

1300M

1030M

1003M Earth Diam.

1 k300k

10 k30 k Mnt. Everest

100 k3 k

Radio Waves

f: (Hz):(m)Relevant Dim:

- M300mRedwool Tree
- M30m
100 M3m

- G300mmHydrogen Line
10 G30mm

100 G3mm

Radio Waves

f: (Hz):(m)Relevant Dim:

- T300mBacterium
- T30m
100 T3m

Infrared

- P300mVirus Visible
- P30m UV
- P3m X-Rays

f: (Hz):(m)Relevant Dim:

- E300mAtomX-Rays
10E30mX-Rays

100 E3mGama Rays

- 1021300mGama Rays
10102130mGama Rays

100 10213mGama Rays

Name:Freq:Use:

ELF3-30 Hz

SLF30-300 HzPower Grids

ULF300-3000 Hz

VLF3-30 kHzSubmarines

LF30-300 kHzBeacons

MF300-3000 kHzAM Broadcast

Name:Freq:Use:

HF3-30 MHzShortwave

VHF30-300 MHzFM, TV

UHF300-3000 MHzTV, LAN, Cellular

SHF3-30 GHzRadar, GS Sat, data

EHF30-300 GHzRadar, Automotive

What is light-year distance?

60 x 60 x 24 x 365 x 3.0 x 108 = 9.46 x 1015 m