Subject	reflection
Predicate	can happen
Object	at the same time in a wave
Modality	Modality Occurrences
Polarity	POSITIVE
Plausibility	0.3140
Neighborhood Sigma	0.3318
Local Sigma	1.0000
Example Sentences	Sentence Occurrences Source reflection and diffraction can happen at the same time in a wave 1 Answers.com Questions