?????????????????????? ??????? ??????? ??????????? ?????? ??????? ?????????? ????????? ?????? ???????? ?????? ??? ??????? ( M ) ???. ??? ??????? ?? ??????? ???? ???.

${\displaystyle \mathrm {M} ={\frac {u}{c}},}$

????:

M = ??? ???????, (?????? ???/????????) ^[?]

u = ????????? ??????? ???, ???

c = ?????????? ??????? ???.

?????????????, ??? ? ?????? ??????? ???. ??? ?.?? ?????? ????????? ???????? ??% ??? (???????), ??? ??? ?.?? ?????? ????????? ?????????? ??% ????? ??? (?????????).

??? ?????????? ???????? [ ?????? ]

?????? ??? ????? [ ?????? ]