[问答题]
What is the index of refraction of aza6(ye hp/ uthgata-8+6b;.kfme,0 9gnzy q c clear material if a minimum of 150 n229i(dr jfefj m thickness of it, when laid on glass, is needed to reduce ref2jr i 9(defj2flection to nearly zero when light of 600 nm is incident normally upon it? Do you have a choice for an answer?
