The phenomenon of light bending around a human finger when viewed closely is primarily attributed to edge refraction. This optical effect occurs due to the interaction of light with the edges of the finger, which creates a distortion in the visual perception of objects behind it. When the finger is positioned about 2-3 inches from the eye, the brain interprets the light paths differently, resulting in the appearance of bending. This effect is not an illusion but a real optical occurrence influenced by the proximity of the finger to the viewer's eye.
PREREQUISITESStudents of physics, optical engineers, and anyone interested in the science of light and visual perception will benefit from reading this discussion.
42Physics said:Why does light appear to bend around my finger when I have it close to my eye? Try it with your phone/tablet. Keep the object about 2-3 inches away and put your finger to your eye, and watch the letters bend. I am aware of the property of light with gravity and everything, but why is it so noticeable around a 3 inch human finger? Is it a trick of the eye or is it real?