1. April 17 Learning Target: I can explain and demonstrate how optics works Vocabulary : 1. thin lens 2. Converging lens 3. diverging lens Agenda: Optics Notes on thin lenses Finish Optic labs-make sure to do all 12 labs Quiz Homework on optics

2. Quiz on Optics • The speed of light is • When light passes from one transparent medium into another, some of the incident light is _______________________ at the boundary. • Snell’s law is also known as • The law when the angle of refraction depends on the speed of light in two media and on the incident angle is called • What is the effect called when all the light is reflected and none is refracted 3x108 Reflected Law of refraction Snell’s law Total Internal reflection

3. Quiz on thin lens • If rays parallel to the axis fall on a thin lens, they will be focused to a _________________________ • The plane containing all focal points is called the • The unit for lens power is called the ____________ • ______________lenses are thicker in the middle • ______________lenses are thicker at the edges Focal point focal plane Diopter Converging diverging