7. Ukucheba akukho perpendicular xa usika izinto ezityebileyo?

Isizathu 1: Iqonga lomsebenzi alikho perpendicular intloko laser.

Isisombululo: Lungisa iqonga elisebenzayo ukuze libe li-perpendicular kwintloko ye-laser.

Isizathu 2: Ugqaliselo aluchanekanga.

Isisombululo: Lungisa kwakhona.

Isizathu 3: Ukhetho lweLens yokuGqalisela aluchanekanga.

Isisombululo: Kutshintshwe ilensi echanekileyo.