, , . , , ω0:
, . 7.7. 1 2 . ω0, - . ( ) . φ0 :
, .
:
7. .
(, ) , . , . .// 20- 20 . , , . .//
, , . , . , , , , .(d = λ) v. d . = v*L; . = ν, = 1/ν . v. d = v*T, v . d = v*t. d′ = d d = (v - v)*T = (v - v)/ν.| ν′ = v/λ′ = (v*ν)/(v - v) | ν′ = . 400 v=30 /; ν′ = = 440 ;
ν″ = , .