http://www.ck12.org Chapter 13. Light
- A ray of light passes from air into water at an incident angle of 60◦. Find the angle of refraction.
- Light passes from water into a block of transparent plastic. The angle of incidence from the water is 31◦and
the angle of refraction in the block is 27◦. What is the index of refraction for the plastic? - The index of refraction of water is 1.36. What is the speed of light in water?
- If the speed of light in a piece of plastic is 2. 00 × 108 m/s, what is the index of refraction for the plastic?
- refraction :The change of direction of a ray of light or sound in passing obliquely from one medium into
another in which its wave velocity is different. - optically dense:Refers to the ability of a material to slow the light waves. The greater the optical density of
a material, the greater the slowing effect. - Snell’s Law:For a light ray incident on the interface of two media, the sine of the angle of incidence times
the index of refraction of the first medium is equal to the sine of the angle of refraction times the index of
refraction of the second medium. - index of refraction: The ratio of the speed of light in a vacuum to the speed of light in a medium under
consideration. - mirage:An optical phenomenon that creates the illusion of water, often with inverted reflections of distant
objects, and results from the refraction of light by alternate layers of hot and cool air.
- refraction :The change of direction of a ray of light or sound in passing obliquely from one medium into