Physical Science Chapter 14 Lights, Mirrors, and Lenses

Vocabulary Words	Objective Questions
14-1  Properties of Light	page 404
light ray medium reflection opaque translucent transparent pigments	What happens when a light wave strikes an object? What determines the color of an object? What are the primary colors of light? pigment? What color do you get when you mix all the colors of light? pigment? Explain.
14-2  Reflection and Mirrors	page 409
law of reflection angle of reflection reflected ray angle of incidence incident ray focal point focal length normal diffuse reflection convex mirror concave mirror optical axis	What determines the sharpness of a reflected image? What is the difference between diffuse reflection and regular reflection? What is a plane mirror? What is the difference between a concave and convex mirror? What are some uses for ... plane mirror? concave mirror? convex mirror?
14-3  Refraction and Lenses	page 416
refraction lens convex lens concave lens optical fibers cladding	What happens when light travels from one medium to the next? What is the speed of light? Why does light bend? What is the difference between convex and concave lenses? What is total internal reflection? What is the role of total internal reflection with regards to fiber optics? What is the critical angle?
14-4  Using Mirrors and Lenses	page 421
microscope objective lens eyepiece lens refracting telescope reflecting telescope	How does a compound microscope work? Why is a reflecting telescope better than a refracting telescope? What type of lens does a camera use? Why are laser beams so intense? What can laser beams be used for?

*Accidents in Science:  Eyeglasses---Inventor Unknown   page 428-429