So, you finally bought those spectacles you have been eyeing for a while. But after a few days, you notice scratches on them. Imagine how crest-fallen that could make you feel. For someone who has to wear eyeglasses to see…

Refraction is the bending of light when it passes from one medium to another. We can see when the light rays are refracted in the eye as they pass through the cornea and lens and are focused on the retina.…