Practice Test for Ch. 17 & 18

1. Practice Test for Ch. 17 & 18 Modified questions from both quizzes to be used with iRespond

2. Question 1 The spot where reflected rays from parallel incident light will converge is called the _________________ and is found at a distance of ½ the radius of the circle. iRespond Question Multiple Choice F A.) Object B.) Focal point C.) Principal axis D.) Center of curvature E.)

3. iRespond Question Multiple Choice F Question 2 A ____________________ image is an image formed when reflected light rays diverge and a ____________________ image is an image formed when reflected light rays converge. A.) Inverted; Upright B.) Real; Virtual C.) Virtual; Real D.) Upright; Inverted E.)

4. iRespond Question Multiple Choice F Question 3 A concave mirror is called a _____________ mirror because it forces light rays to meet at a single point and a convex mirror is called a ______________ mirror because it causes light rays to spread out and never meet. A.) Chromatic; Diffuse B.) Diverging; Converging C.) Converging; Diverging D.) Diffuse; Chromatic E.)

5. iRespond Question Multiple Choice F Question 4 The solution for fixing ______________ is to use a parabolic mirror. A.) Transverse aberration B.) Spherical aberration C.) Chromatic aberration D.) Longitudinal aberration E.)

6. iRespond Question Multiple Choice F Question 5 As a light ray travels from a medium with a higher index of refraction to a medium with a lower index of refraction (such as from water into air), the angle of refraction will _________________. A.) Be equal to the angle of incidence B.) Increase (bend away from the normal) C.) Decrease (bend toward the normal) D.) E.)

7. Question 6 Total internal reflection always occurs when: iRespond Question Multiple Choice F A.) the incident angle is more than the critical angle. B.) light is traveling from a higher n to a lower n. C.) the incident angle is less than the critical angle D.) light is traveling from a lower n to a higher n. E.)

8. iRespond Question Multiple Choice F Question 7 A convex lens is called a _____________ lens because it forces light rays to meet at a single point and a concave lens is called a ______________ lens because it causes light rays to spread out and never meet. A.) Diffuse; Chromatic B.) Converging; Diverging C.) Diverging; Converging D.) Chromatic; Diffuse E.)

9. iRespond Question Multiple Choice F Question 8 The condition where the focal length of the human eye is too short is called ________________ and it can be correct with a __________ lens. A.) Farsightedness; Converging B.) Nearsightedness; Converging C.) Farsightedness; Diverging D.) Nearsightedness; Diverging E.)

10. iRespond Question Multiple Choice F Question 9 A spherical, concave mirror has a radius of curvature of 60.0 cm. A candle is placed on the principal axis 25.0 cm from the mirror. Which set up is correct? A.) Concave @ C B.) Concave @ F C.) Concave between F and C D.) Concave between F and mirror E.) Any placement gives the same answer

11. iRespond Question Multiple Choice F Question 10 An object is 20.0 cm from a concave mirror of 15.0 cm focal length. The object is 1.8 cm high. Which description of the image is correct? A.) Real, Inverted, Enlarged B.) Virtual, Upright, Reduced C.) Virtual, Upright, Enlarged D.) Real, Inverted, Reduced E.)

12. iRespond Question Multiple Choice F Question 11 A bird that is 12.0cm tall sits on a perch that is 24.0cm from a double concave lens that has a focal length of 12.0cm. Which setup is correct? A.) Concave @ 2F B.) Concave @ F C.) Concave between F and 2F D.) Concave between F and lens E.) Any placement gives the same answer

13. iRespond Question Multiple Choice F Question 12 A small penguin toy that is placed 25.0cm away from a double convex lens with a focal length of 10.0cm. Which description of the image is correct? A.) Virtual, Upright, Reduced B.) Virtual, Upright, Enlarged C.) Real, Inverted, Reduced D.) Real, Inverted, Enlarged E.) None of these

14. Question 13 What type of image is NOT produced by a concave mirror? iRespond Question Multiple Choice F A.) Virtual, Upright, Enlarged B.) Virtual, Upright, Same size C.) Real, Inverted, Reduced D.) Real, Inverted, Same size E.) Real, Inverted, Enlarged

15. If the height of an image is negative, which of the following is also true? (select all that apply) iRespond Question Multiple Response F A.) The image is upright B.) The image is inverted C.) The image is real D.) The image is virtual E.)

16. Question 15 Under which conditions should you use a negative focal length? (select all that apply) iRespond Question Multiple Response F A.) Plain mirror B.) Concave mirror C.) Convex mirror D.) Concave lens E.) Convex lens

17. Question 16 Which of the following indicates that an image is virtual? iRespond Question Multiple Choice F A.) The distance to the image is positive B.) The height of the image is positive C.) The distance to the image is negative D.) The height of the image is negative E.)

18. Question 17 When drawing the diagram for a concave lens with an object at F, the first ray goes parallel to the principal axis then... iRespond Question Multiple Choice F A.) refracts and converges to the focal point on the opposite side B.) refracts and diverges from the focal point on the same side C.) reflects and converges to the focal point on the opposite side D.) reflects and diverges from the focal point on the same side E.)

19. Question 18 If an incident angle is equal to the critical angle, which choice best describes what will happen to the light? iRespond Question Multiple Choice F A.) The light will bend all the way to the normal B.) The light will bend 90 degrees away from the normal C.) The light will reflect at an angle equal to the incident angle D.) The light will pass through without bending or reflecting E.)

20. Answers to Practice Test • B • C • C • B • B • A • B • D • D • A • E • C • B • BC • CD • C • B • B