Peter's expression when jan saw him at lunch was difficult to decode. one part of his face registered one emotion and another part of his face registered a different emotion. therefore, peter was demonstrating:

Affect blend.

Explanation:

Affect blend is the situation when facial expression are expressing and depicting about multiple emotions and feeling at the same time.Expression from one phase of face describes a particular emotion and other phase of face depict different emotion.This can lead to confusion in understanding the actual emotion

According to the question,Perter's facial expression is describing affect blend phenomena where he is displaying two different emotions from face.

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the density would be a smaller number.