??????? ??????????????? ?????????????????? ???????.
Lights flash at
frequency f
= 0.5 Hz (Hz = hertz), 1.0 Hz or 2.0 Hz, where
Hz
means
flashes per second. T is the
period
and T =
s
(
s
= seconds) means that
is the number of seconds per flash. T ???????
f
????????
????????? ???????????
:
f
= 1/T
???????
T = 1/
f
.
???????
(????????,
Hertz, Hz
)
???????????
????????
????????
. ????????? ???
????
(process) ??????
???????
(signal) ???
????????
?????? ?????????? ????????????? ???????? ??????????
????????? ?????????
. ??? ??????? ???? ?????? ??? ???????? ??? ??????? ?????????? ?????????? ????. ??? ???
??? ???? ????????
. ????
?1
???????? ?????? ???? ??????????.
???? ????????
kilohertz (103 Hz, ???????? KHz),
???? ????????
megahertz (106 Hz,???????? MHz),
???? ????????
gigahertz (109 Hz, ???????? GHz), and
???? ????????
terahertz (1012 Hz,???????? THz) ????? ?????? ??????????? ???????????????.
???? ??????
, ????????? ?????, ??????? ?????????? ????????? ???????
??? ??????????
????? ???????? ????????????.
????????? ??????
?????????????? ????????????????? ??????????
?????????
????????????
??????? ???????
???????????????? ??????? ??????? ????????????????????.
???????????????
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