Physics I Honors: Chapter 13 Practice Test
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1 Physics I Honors: Chapter 13 Practice Test Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. 1. Which portion of the electromagnetic spectrum is used in a television? a. infrared waves c. radio waves b. X rays d. gamma waves 2. What is the frequency of infrared light of m wavelength? a Hz c Hz b Hz d Hz 3. What is the wavelength of an infrared wave with a frequency of Hz? a m c m b m d m 4. In a vacuum, electromagnetic radiation of short wavelengths a. travels as fast as radiation of long wavelengths. b. travels slower than radiation of long wavelengths. c. travels faster than radiation of long wavelengths. d. can travel both faster and slower than radiation of long wavelengths. 5. If you are reading a book and you move twice as far away from the light source, how does the brightness at the new distance compare with that at the old distance? It is a. one-eighth as bright. c. one-half as bright. b. one-fourth as bright. d. twice as bright. 6. Snow reflects almost all of the light incident upon it. However, a single beam of light is not reflected in the form of parallel rays. This is an example of reflection off a surface. a. regular, rough c. diffuse, specular b. regular, specular d. diffuse, rough 7. When a straight line is drawn perpendicular to a flat mirror at the point where an incoming ray strikes the mirror s surface, the angles of incidence and reflection are measured from the normal and a. the angles of incidence and reflection are equal. b. the angle of incidence is greater than the angle of reflection. c. the angle of incidence is less than the angle of reflection. d. the angle of incidence can be greater than or less than the angle of reflection. 8. If a light ray strikes a flat mirror at an angle of 14 from the normal, the reflected ray will be a. 14 from the mirror s surface. c. 90 from the mirror s surface. b. 76 from the normal. d. 14 from the normal. 9. When two parallel mirrors are placed so that their reflective sides face each other, images form. This is because the image in one mirror becomes the for the other mirror. a. multiple, object c. inverted, center of curvature b. reduced, virtual image d. enlarged, focal point 10. Which of the following best describes the image produced by a flat mirror? a. virtual, inverted, and magnification greater than one b. real, inverted, and magnification less than one c. virtual, upright, and magnification equal to one d. real, upright, and magnification equal to one 11. When the reflection of an object is seen in a flat mirror, the distance from the mirror to the image depends on
2 a. the wavelength of light used for viewing. b. the distance from the object to the mirror. c. the distance of both the observer and the object to the mirror. d. the size of the object. 12. A concave mirror forms a real image at 25.0 cm from the mirror surface along the principal axis. If the corresponding object is at a 10.0 cm distance, what is the mirror s focal length? a cm c cm b cm d cm 13. A convex mirror with a focal length of 20.0 cm has an object 30.0 cm in front of the mirror. What is the value of q for the corresponding image? a. c. b. d. 14. Which best describes the image of a concave mirror when the object s distance from the mirror is less than the focal-point distance? a. virtual, upright, and magnification greater than one b. real, inverted, and magnification less than one c. virtual, upright, and magnification less than one d. real, inverted, and magnification greater than one 15. Which of the following is not a primary subtractive color? a. yellow c. magenta b. cyan d. blue 16. If you looked at a light through the lenses from two polarizing sunglasses that were overlapped at right angles to each other, a. all of the light would pass through. c. little of the light would pass through. b. most of the light would pass through. d. none of the light would pass through. Short Answer 17. Describe the reflected image of a flat mirror in terms of distance, height, real or virtual, and reversed or not. Problem 18. A certain radio wave has a frequency of Hz. What is its wavelength? 19. A concave mirror with a focal length of 18.0 cm forms a real image at 26.0 cm from the mirror s surface along the principal axis. How far is the corresponding object located from the mirror s surface? 20. A 1.5 cm high image of a candle is formed by a convex mirror whose focal length is 8.0 cm. The virtual image is 3.00 cm from the mirror s surface. The image s magnification is Draw a ray diagram to determine the position and height of the corresponding object. Use the equation for magnification to confirm the results of your diagram. 21. A concave spherical mirror has a radius of curvature of 20.0 cm. A candle that is 10.0 cm tall is placed 30 cm in front of the mirror. Draw a ray diagram to find the image distance and height. Confirm the results of your diagram with the mirror equation and the equation for magnification.
3 Physics I Honors: Chapter 13 Practice Test Answer Section MULTIPLE CHOICE 1. ANS: C DIF: I OBJ: ANS: D DIF: IIIA OBJ: ANS: C DIF: IIIA OBJ: ANS: A DIF: I OBJ: ANS: B DIF: II OBJ: ANS: D DIF: II OBJ: ANS: A DIF: I OBJ: ANS: D DIF: II OBJ: ANS: A DIF: II OBJ: ANS: C DIF: I OBJ: ANS: B DIF: I OBJ: ANS: B
4 DIF: IIIB OBJ: ANS: B DIF: IIIB OBJ: ANS: A DIF: II OBJ: ANS: D DIF: I OBJ: ANS: D DIF: II OBJ: SHORT ANSWER 17. ANS: The reflected image of a flat mirror is virtual, appears to originate from a distance behind the mirror that is equal to the object s distance in front of the mirror, has the same height as the object, and is reversed. DIF: I OBJ: PROBLEM 18. ANS:
5 DIF: IIIA OBJ: ANS: DIF: IIIB OBJ: ANS:
6 DIF: IIIC OBJ: ANS:
7 DIF: IIIC OBJ:
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