Cov hlaws iav yog tsim los ntawm kev tua iav xuab zeb. Raws li qhov loj me, cov hlaws iav tuaj yeem muab faib ua iav hlaws (iav hlaws yog ib hom iav hlaws thiab xa mus rau cov khoom sib txuas nrog qhov loj me me ntawm 1 hli) thiab iav hlaws. Raws li kev siv, nws tuaj yeem muab faib ua cov iav tsom iav hlaws, sandblasting iav hlaws, sib tsoo iav hlaws, thiab txhaws iav hlaws. Ntawm lawv, cov iav tsom iav tuaj yeem muab faib ua kev tiv thaiv kev nyab xeeb iav hlaws thiab tshuaj ntsuam iav hlaws; Raws li qhov refractive index, nws tuaj yeem muab faib ua qhov ntsuas dav dav dav dav thiab siab refractive index iav hlaws. Qhov dav dav refractive index yog nyob nruab nrab ntawm 1.5-1.64, thiab qhov siab refractive index feem ntau yog 1.8-2.2. Piv txwv tias qhov zoo tshaj plaws rau kev xav yog iav hlaws nrog qhov ntsuas qhov ntsuas ntawm 1.93, qhov ntsuas qhov ntsuas qhov ntsuas no tuaj yeem txaus siab rov qab rau cov kab hluav taws xob sib luag, yog li qhov siab dua qhov ntsuas qhov ntsuas tsis yog qhov zoo tshaj plaws kev xav.
