(: , Hz) (, ).
1 () , : 1 = 1/.
10 , .
f = 0,5 ( = ), 1,0 2,0 ,

. - =

( = ) ,

, . : f=1/T ; T=1/f.
[]
- XIX , . 1930 . 1960 ( ).
[]
.
|
|
|
|
|
|
|
|
| 101 |
|
|
daHz |
101 |
|
|
dHz |
| 102 |
|
|
hHz |
102 |
|
|
cHz |
| 103 |
|
|
kHz |
103 |
|
|
mHz |
| 106 |
|
|
MHz |
106 |
|
|
µHz |
| 109 |
|
|
GHz |
109 |
|
|
nHz |
| 1012 |
|
|
THz |
1012 |
|
|
pHz |
| 1015 |
|
|
PHz |
1015 |
|
|
fHz |
| 1018 |
|
|
EHz |
1018 |
|
|
aHz |
| 1021 |
|
|
ZHz |
1021 |
|
|
zHz |
| 1024 |
|
|
YHz |
1024 |
|
|
yHz |
| |
[]
- , , 20 20 .
- 1 (, Herz «». , Hertz).