Crossword puzzle clue "optical phenomenon"

Here are the possible solutions for optical phenomenon clue

Answer
Clue
Relevancy
mirage
Clue
Optical phenomenon
Definition
a type of optical illusion
parallax
Clue
Optical phenomenon
Definition
an apparent optical displacement of an object
phi
Clue
___ phenomenon (optical illusion)
Definition
a Greek letter
aas
Clue
Batteries in optical mice
Definition
AA, (Hawaiian) a volcanic rock consisting of angular blocks of lava with a very rough surface
aorb
Clue
Optical illusion question, "Which is longer, ___?"
Optical illusion query, “Which is longer, ___?”
'Which is longer, --?' (optical illusion question)
aperture
Clue
Optical opening
Definition
an opening

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