# Introduction to Physical Science

## Chapter 19: Light, Mirrors, and Lenses

### Section 2 Self-Check Quiz-Eng.

 1. What is called the normal to the surface? Need a Hint? A) the line perpendicular to where the light ray strikes the surface B) the line parallel to a reflecting surface C) the reflecting surface itself D) the angle of the incoming beam of light 2. Which of the following is the law of reflection? Need a Hint? A) The angle of incidence is equal to the angle of reflection. B) The angle of incidence is equal to the normal. C) The angle of reflection is equal to the normal. D) The normal is perpendicular to the reflecting surface. 3. Object A reflects more than object B. Therefore, object A is __________ object B. Need a Hint? A) rougher than B) smoother than C) just as smooth as D) made of the same material as 4. A mirror with a flat surface is called a __________ mirror. Need a Hint? A) plane B) convex C) concave D) flat 5. What occurs to light waves in a convex mirror? Need a Hint? A) They converge. B) They diverge. C) They reflect at right angles. D) They are absorbed. 6. What is a focal length? Need a Hint? A) the difference between the angle of incidence and the angle of reflection B) the distance from the mirror to the reflecting object C) the distance light travels along a reflective surface D) the distance from the center of the mirror to the focal point