Pencil-in-Glass Optical Illusion Image - Visual Perception Example #3498584 (License: Personal Use)

This digital illustration shows a transparent glass filled with blue liquid, with a green pencil inserted diagonally so that its submerged portion appears bent-mimicking the classic refraction illusion. The pencil’s tip rests on the bottom while the upper part extends above the rim, reinforcing the visual trick. The clean, minimalist style emphasizes the scientific principle at play.

Used in educational articles about light refraction, physics demonstrations, psychology pages on perception, or creative design blogs illustrating visual tricks. Matches user intent for learning, teaching, or inspiration.