University:
Franklin University
Course:
SCIE-100 | Physical Science
Academic year:

2022
Views:

217

Pages:

2
Author:

5prinzg1s

Chapter 33 Geometric Optics 1) Suppose you place your face in front of a concave mirror. Which one of the following statements is correct? A) If you position yourself between the center of curvature and the focal point of the mirror, you will not be able to see a sharp image of your face. B) No matter where you place yourself, a real image will be formed. C) Your image will always be inverted. D) Your image will be diminished in size. E) None of these statements are true. 2) Which statements are true about a VIRTUAL image? (There may be more than one correct choice.) A) Its location can be calculated, but it cannot be viewed directly by your eye without using auxiliary lenses. B) It cannot be photographed. C) It cannot be viewed on a screen. D) A plane mirror always forms a virtual image. E) A concave lens always forms a virtual image. 3) A object is 12 cm in front of a concave spherical mirror, and the image is 3.0 cm in front of the mirror. What is the focal length of the mirror? A) 0.25 cm B) 15 cm C) 4.0 cm D) 2.4 cm E) 1.3 cm 4) A convex spherical mirror with a focal length of magnitude 25 cm has a 4.0-cm tall flower placed 100 cm in front of it. What is the height of the image of the flower? A) 0.80 cm B) 20 cm C) 4.0 cm D) 1.6 cm E) 8.0 cm 5) A goldfish bowl is spherical, 8.0 cm in radius. A goldfish is swimming 3.0 cm from the wall of the bowl. Where does the fish appear to be to an observer outside? The index of refraction of water is 1.33. Neglect the effect of the glass wall of the bowl. A) 3.3 cm inside the bowl B) 3.9 cm inside the bowl C) 2.5 cm inside the bowl D) 3.0 cm inside the bowl E) 1.7 cm inside the bowl 6) The left-hand end of a glass rod is ground to a spherical surface. The glass has index of refraction 1.50. A small object 4.00 mm tall is placed on the axis of the rod, 37.0 cm to the left of the vertex of the spherical surface. The image is formed in the rod, 50.0 cm to the right of the vertex. (a) What is the magnitude of the radius of curvature of the spherical surface at the end of the rod? (b) What is the height of the image? 7) In the figure, the thin lens forms a real image of the object 94.0 cm from the object. What is the focal length of the lens? A) 22.0 cm B) 25.5 cm C) 27.5 cm D) 55.8 cm E) 86.0 cm 8) It is desired to project the image of an object four times its actual size using a lens of focal length 20 cm. How far from the lens should the object be placed? A) 100 cm B) 80 cm C) 4.0 cm D) 25 cm E) 5.0 cm 9) An object 1.25 cm tall is placed 100 cm in front of a convex lens with a focal length of magnitude 50 cm. A concave lens with a focal length of magnitude 20 cm is placed 90 cm beyond the first lens. Where is the final image located? A) 10 cm in front of the second lens B) 20 cm past the second lens C) 17 cm past the second lens D) 10 cm past the second lens E) 20 cm in front of the second lens

Geometric Optics Fourth Assignment Questions

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