The phenomenon that creates the illusion of movement.

The phenomenon that creates the illusion of movement.

• A. Displacement
• B. Persistence of Vision
• C. Parallax
• D. Temporal Illusion

Answer: (A)

Persistence of vision explains why a rapid sequence of still images can look like continuous movement. When frames are shown quickly, the visual system holds onto a brief afterimage of the previous frame. That brief retention overlaps with the next frame, so the brain blends them into smooth motion rather than seeing each frame separately. This is the trick behind films, animated cartoons, and flipbooks—the frame rate is high enough that the gaps disappear and motion appears fluid. Displacement isn’t about creating motion from fleeting images; it refers to a shift in position or direction. Parallax involves depth perception from viewing objects at different distances as you move, not a general illusion of movement from rapid sequencing. Temporal illusion is about misperceived timing, not the specific phenomenon that makes motion appear from a rapid display of images.

Persistence of vision explains why a rapid sequence of still images can look like continuous movement. When frames are shown quickly, the visual system holds onto a brief afterimage of the previous frame. That brief retention overlaps with the next frame, so the brain blends them into smooth motion rather than seeing each frame separately. This is the trick behind films, animated cartoons, and flipbooks—the frame rate is high enough that the gaps disappear and motion appears fluid.

Displacement isn’t about creating motion from fleeting images; it refers to a shift in position or direction. Parallax involves depth perception from viewing objects at different distances as you move, not a general illusion of movement from rapid sequencing. Temporal illusion is about misperceived timing, not the specific phenomenon that makes motion appear from a rapid display of images.