Let's tackle subtraction first. Subtraction in hexadecimal works similar to subtraction in decimal. Let's do a pair of decimal problems and see if we can parallel the solution method in hex. Suppose we want to subtract 1586 - 243 (in decimal).
Refraction of Light Rays. the bending or deflection of light rays as they pass through the various media of the eye that include the conjuctiva, cornea, aqueous humor, lens, and vitreous body.
1. The bending or turning of a wave, such as a light or sound wave, when it passes from one medium to another medium of different density. See more at wave. Compare reflection. 2. The apparent change in position of a celestial body caused by the bending of light as it enters the Earth's atmosphere.