Nkebi ahịrịokwu 1: A pụrụ ịkọwa usoro dị irè site na ntinye dị mfe nke absorption na emission na frequencies nke Formula 2 na Formula 3. Nkebi ahịrịokwu nke 2: A pụrụ ịkọwa usoro dị irè site na ntinye dị mfe nke absorption na emission na frequencies formula _ 2 na formula _ 3. Ajụjụ: Ọ̀ bụ otu ihe ka ahịrịokwu nke mbụ na nke abụọ pụtara? Ee ma ọ bụ Ee e?
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