Answer :
Answer:
"That's because different wavelengths lead to the perception of different colors."
Explanation:
Geek is defined as an enthusiast or expert especially in a technological field or activity. Considering this definition of Geek, we can infer Joachim might say "That's because different wavelengths lead to the perception of different colors." since by saying this he would be agreeing with Maricella about the Rainbow's beauty and explain how the nature of a rainbow works at the same time.