Which of the following is an example of the phi phenomenon

A)  mixing of coloured lights to produce different colours 
B)  flashing lights that produce the illusion of movement 
C)  drawing a two-dimensional image that shows depth 
D)  seeing a reversible figure differently after priming

The phi phenomenon refers to the illusion of movement created by flashing lights or rapidly changing stimuli, which is commonly seen in movies and animations. Therefore, option B is the correct choice. Options A, C, and D are not examples of the phi phenomenon. Mixing of coloured lights to produce different colours is an example of additive colour mixing. Drawing a two-dimensional image that shows depth is an example of a monocular depth cue, while seeing a reversible figure differently after priming is an example of perceptual adaptation.