Question: Ngenkathi enza uphenyo mayelana ne-refraction, uthisha usebenzisa nto yokukhomba ye-laser ebomvu ukuze abonise ukuthi umsebe wokukhanya uthinteka kanjani njengoba udabula ezintweni ezimbalwa zengilazi. Uthisha kufanele aqinisekise ukuthi
Options:
endlini kumnyama ngokuphelele.
umthombo wokukhanya u-ultraviolet.
umsebe wokukhanya awuhambi ubheke ezitshudenini.
izindonga zendlu zivikelwe ngokukomboza (insulating material).
Answer: C