Mabda'a shaqada ee isku-xidhka laysarka waa in la isku keeno iftiin kala duwan iyada oo loo marayo hal ama koox muraayado dherer togan oo togan, si ay u noqoto mid barbar socota dhidibka indhaha. Tusaale ahaan, haddii iftiinka ka soo baxa cidhifka laysarka fiilada uu yar yahay oo uu kala duwanaado dhowr darajo, isku-xidhku wuxuu isku-xidhi karaa laysarka oo u rogi karaa laysarka dhexroor weyn laakiin xagal aad u yar oo kala-duwan.
Kontaroolahan korontada ku shaqeeya wuxuu isku dhejin karaa laysarka fiber-ka indhaha, wuxuuna si wax ku ool ah uga shaqeyn karaa masaafooyin dheer; nooca gacanta lagu qaato, hawlgalka bannaanka oo ku habboon; madaxa korontada oo sax ah, si dhakhso ah u beegso bartilmaameedka.
Wavelength waxay diiradda saareysay bixinta alaabada indhaha ee saxsan ee sare muddo 20 sano ah