C1-4 Practice Quiz (NO CALC)

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Oct 30, 2023

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Lesson C1-4 Practice Quiz Name: _________________ NO Calculator Allowed! Part A: True or False (5 marks) For each question circle the T (True) or F (false) to indicate your answer T F 1. The focal length of a convex mirror is sometimes + and sometimes – T F 2. Converging lenses will always produce smaller images T F 3. The height of the image produced in a convex mirror is sometimes + and sometimes – T F 4. If an object is placed at the radius of curvature in front of a concave mirror, the magnification of an image will be +1 T F 5. If light travels from water into diamond, total internal reflection is not possible. T F 6. When light travels from a less dense (low n) to a more dense (high n) medium, the wavelength increases T F 7. At the critical angle of a water/air interface, the angle of refraction is 90° T F 8. An image produced in a diverging lens will have a di that is sometimes + and sometimes – T F 9. It is possible for a single optics calculations to have – f, +di and +hi T F 10. If an object is placed on the right side of a converging lens, then any images formed on the right side of the lens are considered virtual images. Part B: Multiple Choice/Numerical Response (15 marks) 1. A 10 cm tall object is placed 20 cm in front of a concave mirror with a centre of curvature of 30cm. What is the image distance? A. -8.3 cm B. +20 cm C. +30 cm D. +60 cm 2. A 5 cm tall object is placed 20 cm in front of a diverging lens with a focal length of 10 cm. What is the image distance? A. +20 cm B. +10 cm C. -20 cm D. -6.7 cm
3. A 5 cm tall object is placed 12 cm in front of a diverging lens with a focal length of 10 cm. What is the magnitude of the height of the image? A. 0.4 cm B. 2.3 cm C. 5.0 cm D. 8.0 cm 4. A 10 cm tall object is placed 20 cm in front of a concave mirror with a focal length of 10 cm. What is the height of the image? A. +10 cm B. +20 cm C. -10 cm D. -20 cm 5. An 8 cm tall object is placed 80 cm in front of a converging lens with a focal length of 10 cm. What is the image distance? A. -13 cm B. -19 cm C. +13 cm D. +19 cm 6. An 8 cm tall object is placed 12 cm in front of a concave mirror with a radius of curvature of 24cm. What is the image distance? A. +10 cm B. +12 cm C. -8.0 cm D. no image forms 7. The upright image of an object appears 7.0 cm in front of some kind of optical device, either a mirror or a lens. If the object is 12 cm from the optical device, what kind of optical device is it and what is the focal length? A. The optical device is a converging mirror and its focal length is +17 cm. B. The optical device is a diverging mirror and its focal length is 17 cm. C. The optical device is a converging lens and its focal length is +17 cm. D. The optical device is a diverging lens and its focal length is 17 cm. 8. In an optics question, if the magnification is +1.7, then which of the following is true: A. The image is formed with a diverging optical device. B. The image is formed with a converging optical device and the object was placed in front of the focal point. C. The image is formed with a converging optical device and the object was placed behind the centre of curvature (2f). D. The image is formed with a converging optical device and the object was placed between the focal point and the centre of curvature (2f).
Use the following information to answer the next two questions. 9. What is the distance between the rotating mirror and the plane mirror in this experiment? A. 7.8 × 10 1 km B. 7.8 × 10 4 km C. 3.9 × 10 1 km D. 3.9 × 10 4 km 10. When the experimenter is using the formula 𝑣 = ∆? ∆𝑡 to calculate the minimum frequency that the mirror must rotate so that the reflected light can be clearly seen, what expression can be used in the last step to manipulate the “ Δt ” into the frequency.? A. 1 ∆𝑡 × 6 B. 1 ∆𝑡 ×6 C. 1 ∆𝑡 ÷ 6 D. 𝛥𝑡 × 1 6 11. When light travels from water to air, which of the following statements is true? A. The angle of refraction is equal to the angle of reflection. B. The angle of refraction is less than the angle of reflection. C. The angle of refraction is greater than the angle of reflection. D. The angle of refraction is less than the angle of incidence. 12. Which of the following diagrams represent all rays when light travels from glass to water, AND ∅ 𝑖 = ∅ ? : A. B. C. D. An experimenter uses a 6-sided mirror to verify the speed of light. The light travels a total path distance of 78000m. water glass i water glass i water glass i water glass i
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Use the following information to answer the next question. 13. The speed of light in material I, compared to that in air and material II, is A. less than in air and less than in material II B. greater than in air but les. s than in material II C. less than in air but greater than in material II D. greater than in air and greater than in material II 14. When light travels from a more dense (high n) to a less dense (low n) medium at less than the critical angle, which of the following statements is true? A. The speed decreases, the wavelength decreases and the angle increases. B. The speed decreases, the wavelength decreases and the angle decreases. C. The speed increases, the wavelength decreases and the angle increases. D. The speed increases, the wavelength increases and the angle increases. 15. The angle of refraction as light shines into a triangular glass prism (n=1.52), incident along the normal is _______˚. (Record your two-digit answer in the boxes provided) A ray of light passes through two different transparent materials as shown. The faces of the materials are planar and parallel.

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