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- Which of the following statements is not consistent with geometric optics. a. Light rays propagate at small angles relative to the optical axis. b. The diffraction of light is neglected. c. Light rays propagate in straight lines. d. Light rays propagate near the optical axis. e. Ordinary objects always exhibit specular reflection when exposed to light.Which of the following statements for single optic devices are true? Choose all that apply. a. Any physicist worth their weight in garbanzo beans (not chick peas) knows that concave lenses will have a positive focal length. b. For virtual images, the image distance is positive and the object distance is negative. c. By convention, if the image height is positive then the image is upright. d. If an optic produces an image with a magnification of 0.6, then the image is diminished. e. Experiments have shown that convex mirrors can create real images. f. If an image has a magnification of -6, then the image is real.7. A plane mirror and a concave mirror (f = 8.00 cm) are facing each other and are separated by a distance of 16.5 cm. An object is placed between the mirrors and is 8.2 cm from each mirror. Consider the light from the object that reflects first from the plane mirror and then from the concave mirror. What is the distance of the image (d;) produced by the concave mirror? cm
- 15. An object is placed at a distance xo =-1.5f in front of a convex lens of focal length f located at x = 0. An identical object is placed at a distance x'o = -2f in front of a concave lens of focal length - f located at x' = 0. Find the difference between the two image positions (x' - Xi). Draw ray diagrams.2. A meter stick is held length wise along the principle axis of a concave mirror. The focal length of the mirror is 40 cm the zero end of the meter stick is L=65 cm from the mirror, %3! Meter stick 100 cm L (A) What type of image (real or virtual) will be formed? Justify/explain. (2 points) (B) How long is the image of the meter stick? Show your work. (8 points)2. A converging mirror has a focal length of f = 18 cm. a. Where must an object be placed in order to form an image that is exactly the same height as the object? (Think about what the magnification for this situation is, and work from there). b. Would this object be real or virtual? Is it upright or inverted? C. Draw a ray diagram for this situation.
- 3. Two converging lenses above are placed 20.0 cm apart, both with focal lengths of 10.0 cm. A candle is 30 cm away from the first lens. By means of a neat ray tracing, locate the final image formed by the combination of the two lenses. b) Use mathematics to fully describe the image created by the lenses.4. A concave mirror is used to produce an inverted image of a light bulb directly below the light bulb. The bulb is located 1.2 m from the mirror. a) What is the focal length of the mirror? b) What is the magnification?6. An object is placed 8.5 cm in front of a convex (converging) spherical lens. Its image forms 3.9 cm in front of the lens. What is the focal length of the lens? * D) 19 cm C) 9.6 cm B) 2.7 cm A) 6.1 cm