Page 133 - Lasers and IPLs in Medical/Aesthetic Applications v1.2
P. 133

Chapter 1 – Fundamentals of Medical/Aesthetic Lasers and IPLs v1.2
Appendix 2 - Prefixes
Often in this field you will see a ‘prefix’ after a number. You are probably familiar with some of these, like ‘mm’ for millimetre, or ‘kg’ for kilogram.
There is an internationally accepted set of such prefixes (Note - the capitalisation is important!!):
       Prefix
   Name
  Factor
     Scientific Notation
                  T
      Tera
   1,000,000,000,000
      1012
    G
 Giga
1,000,000,000
  109
      M
      Mega
   1,000,000
      106
    k
 kilo
1,000
  103
      n/a
   n/a
  1
     100
     m
     milli
  0.001
     10-3
     μ
  micro
 0.000 001
   10-6
     n
     nano
  0.000 000 001
     10-9
     p
  pico
 0.000 000 000 001
   10-12
     f
  femto
 0.000 000 000 000 001
    10-15
                         So, 30 nanoseconds is 30 ns which is 0.000 000 03 seconds.
________________________________________________________________________ 132
Chapter 1 LEVEL A Fundamentals of Lasers/IPLs
© The Laser-IPL Guys 2021















































   131   132   133   134   135