70 Changes to ObamaCareâ¦ â So Far. By our count at the Galen Institute, more than 70 significant changes have been made to the Patient Protection and Affordable Care Act, at least 43 that the Obama administration has made unilaterally, 24 that Congress has passed and the president has signed, and three by the Supreme Court.
When a ray of light or a sound wave refracts or is refracted, the path it follows bends at a particular point, due to a change in the density of the substance it is passing th â¦ rough. For example if you put a pencil in a glass half full of water, the pencil looks like it is broken because the empty glass bends the light differently from the water.
CH 03 pp64-94 6/5/02 12:06 PM Page 72 72 Chapter 3 Light and Telescopes IGURE 3-10 Essentials of a Refracting Telescope A refracting telescope consists of a large, long-focal-length objective lens that collects and focuses light rays and a small, short-focal-length eyepiece lens that restraightens the light rays.