# Physical Science

## Chapter 14: Mirrors and Lenses

### Mirrors and Lenses

 1. Any smooth surface that reflects light to form an image is a(n) __________. Need a Hint? A) mirror B) lens C) optical axis D) camera 2. What type of image does a microscope form? Need a Hint? A) real diminished B) virtual enlarged C) real enlarged D) virtual diminished 3. What kind of lens is helpful to nearsighted people? Need a Hint? A) plane B) flat C) concave D) convex 4. The law of reflection states that __________. Need a Hint? A) the angle of incidence is greater that the angle of reflection B) the angle of incidence is equal to the angle of reflection C) the angle of incidence is less than the angle of reflection D) light waves change their speed when they move from one medium into another 5. A _________ mirror is curved outward. Need a Hint? A) convex B) spherical C) plane D) concave 6. What is the difference between a lens and a mirror? Need a Hint? A) A mirror has no optical axis. B) Lenses reflect light, and light passes through mirrors. C) Mirrors reflect light, and light passes through lenses. D) A lens has no focal point. 7. A _________ mirror is curved inward. Need a Hint? A) convex B) conical C) plane D) concave 8. Which of the following uses a concave mirror? Need a Hint? A) space telescope B) reflecting telescope C) telephoto lens D) refracting telescope 9. The __________ is an imaginary straight line perpendicular to the center of a concave mirror. Need a Hint? A) optical axis B) focal point C) ray D) tangent 10. Which of the following concave lenses forms a virtual image? Need a Hint? A) object beyond three focal lengths B) object between two and three focal lengths C) object within one focal length D) object between one and two focal lengths 11. Which of the following mirror shapes forms a real image? Need a Hint? A) spherical B) concave C) plane D) convex 12. Which of the following does your brain perceive even though no light rays pass through it? Need a Hint? A) virtual image B) mirror C) real image D) lens 13. A __________ lens is thinner in the middle and thicker at the edges. Need a Hint? A) plane B) concave C) spherical D) convex 14. The distance from the center of the mirror to the focal point is called the _________. Need a Hint? A) optical axis B) focal point C) focal length D) optical length 15. A __________ lens is thicker in the middle than at the edges. Need a Hint? A) concave B) plane C) spherical D) convex 16. What type of image is formed on the retina? Need a Hint? A) inverted B) backwards C) upright real D) upright virtual 17. When an object is farther from a concave mirror than the focal point is, the image that is formed is __________. Need a Hint? A) upright and smaller than the object B) inverted and smaller than the object C) enlarged and inverted D) upright and enlarged 18. What structure carries electrical signals from the retina to the brain to be interpreted? Need a Hint? A) focal point B) cornea C) sclera D) optic nerve 19. A _________ mirror is a flat, smooth mirror. Need a Hint? A) spherical B) plane C) convex D) concave 20. What happens to light rays emitted from a light source? Need a Hint? A) They travel in curved paths. B) They remain concentrated at the light source. C) They spread out from the light source. D) They follow the paths of Earth's magnetic field lines.