Nishondihandai shikast

Nishondihandai shikast nisbii du muhit p21 gufta nisbati surathoi pahnoishi rushnoiro dar muhithoi 1-um (i>i) va 2-yum 01

(»}) menomand; p2» == “ (Nishondihandai shikast bu­zurgii beandoza meboshad).

(nig. Shikasti rushnoi).

Agar muhiti 1-um vakuum boshad (ki dar on surati rushnoi saZ-1010 m/son ast), on goh Nishondihandai shikasti muhit nisbat ba on  Nishondihandai shikasti m u t l a q nom dorad: n=c/v.  Nisbati Nishondihandahoi mutlaqi muhitro Nishondihandai shikasti nisbi menomand: n2i =p2/p1.

Nishondihandai shikast ba darozii mavji afkanishot Ya. (basomad v) vobasta ast (nigared Dispersiyai rushnoi). Nishondihandai shikasti mutlaqi muhit bo tadokhuli dielektri e va tadokhuli magnitii muhit r bo ifodai lkh = Ve>% R-kh aloqamand ast.