Laser vuam tau dhau los ua ib feem ntawm peb lub neej niaj hnub thiab koj tuaj yeem pom cov kab ntawm laser vuam hauv cov khoom uas feem ntau pom. Qhov tseeb, laser vuam tshuab tau hloov tag nrho cov txheej txheem vuam tsoos hauv 7 kev lag luam. Thiab hnub no, peb yuav sau lawv ib tug los ntawm ib tug.