Physics Review P10 Solutions PDF

Physics Review P10 Review Topic Important Terms/Concepts Extra Questions Done Light & Waves Types of Light, Sources of Light,...

Physics Review P10 Review Topic Important Terms/Concepts Extra Questions Done Light & Waves Types of Light, Sources of Light, Luminosity, Shadows, 391 # 1, 2, 4, 6 (382–385) Wavelength, Amplitude, Frequency, Crest, Trough Reflection & Mirrors Regular/Diffuse Reflection, Incident/Reflected Ray, 433 # 1, 3, 4, 8, 11, 12 (404–406, 418–427) Normal, Law of Reflection, Focal Point, PA, Real/Virtual Image, Concave/Convex/Plane Mirrors, Ray Diagrams Refraction Index of Refraction, Snell’s Law, Total Internal Reflection 447 # 2, 4, 5, 11–16 (436–443) + Critical Angles 465 # 3, 15–17, 19, 20 Lenses Uses and Properties of Concave/Convex Lenses, Ray 454 # 1, 2, 3 (450–454) Diagrams, Lens Calculations 462 # 1, 5 Human Vision Parts of the Eye, Near/Far-sightedness, Astigmatism, 498 # 2, 4, 8, 9 (470–477) Vision Correction Chapter 10 Review 412–413 # 2, 4, 5, 13, 14, 17 Chapter 11 Review 464–465 # 1, 2, 3, 4, 7, 10, 12, 14, 15, 16, 17, 19, 20, 23, 24, 25 Light & Waves 1. Compare two different sources of light. 2. Explain how shadows are formed. 3. Label the amplitude, wavelength, crest, trough, and rest position on the wave shown to the right. 4. If it takes 10 seconds in total to complete the wave to the right, calculate the period and frequency. 1 Physics Review P10 5. A pendulum goes through 100 cycles in 2 minutes. Calculate its frequency. 6. A ruby-throated hummingbird beats its wings at a rate of about 3600 win beats per minute. a) Calculate the frequency of the wave. b) Assuming sound moves at a speed of 480 m/s, calculate the wavelength. 7. A light ray from a laser has a frequency of 5.7 × 1014 Hz. a) Calculate the wavelength of the light. b) What colour is the light? Reflection & Mirrors 8. State the laws of reflection. 9. Explain why you see a reflection in a mirror but not on the cover of a cloth-bound book. 10. Explain the difference between regular 11. Explain the difference between a real image reflection and diffuse reflection. and a virtual image. 2 Physics Review P10 12. Draw the ray diagram to determine the location of the image and describe its SAT characteristics. a) b) c) 13. An object with a height of 2.5 cm is placed 40 cm in front of a concave mirror (f = 12 cm). a) Calculate the image distance. b) Calculate the image height. 14. An object with a height of 0.4 m is placed 2.5 m in front of a convex mirror (f = –0.90 m). a) Calculate the image distance. b) Calculate the image height. 3 Physics Review P10 Refraction 15. Explain why a soda straw in a container of 16. What conditions are necessary for a mirage water looks bent. Include a diagram. to appear? 17. Calculate the index of refraction if the 18. Calculate the speed of light in a fused speed of light in a solid is 1.24 × 108 m/s. quartz (n = 1.65). 19.Determine the missing information: a) b) 20. A diver shines a laser beam upward from 21. Light travels at 28° to the normal through the bottom of a lake at an angle of 47° to air. It hits a piece of glass and gets refracted the normal. Calculate the angle of refraction 72° degrees from the surface. Calculate the as it passes into the air. index of refraction of the glass. 4 Physics Review P10 22. Explain what is happening in the diagram. 23. Explain what will happen to the ray. Complete the diagram to help explain. Lenses 24. Draw the ray diagram to determine the location of the image and describe its SAT characteristics. a) b) 25. Determine the focal points given the position of the object and image. 5 Physics Review P10 26. An object is placed 1.6 m away from a lens creating an image that is 85 cm from the lens on the opposite side from the object. a) Calculate the focal length. b) Calculate the magnification. c) Will the image be upright or inverted? Will d) What type of lens is it? Provide 3 reasons. it be smaller, larger, or same size? Explain. 27. You are looking through a diverging lens (f = 25 cm from vertex) at a friend who is 2.5 m away. Your friend appears to be 20% smaller. Calculate the distance between your friend and their image. Human Vision 28. Label the diagram of a human eye. 29. The distance between the lens and retina does not change in humans. Explain how the lens can focus on both distant and nearby objects. 6 Physics Review P10 Practice Test Multiple Choice 1. Light strikes a plane mirror at an incident angle 2. A normal line is a line that is: of 38°. What would be the angle between the A) perpendicular to the angle of incidence reflected light ray and the mirror? B) perpendicular to the angle of reflection A) 38° C) 90° C) perpendicular to the reflective surface B) 52° D) 155° D) parallel to the angle of incidence 3. Which type of mirror causes light rays to 4. Magnifying mirrors are usually concave since: converge towards a focal point? A) they can form either virtual or real images A) Concave mirror B) they form a virtual image in front of mirror B) Convex mirror C) they form a smaller virtual image C) Plane mirror D) they form a larger virtual image 5. Which kind of mirror would you put at the end of 6. A company wants to create a mirror that doesn’t your driveway in order to let you see as wide a reverse images with an idea to reflect the image: view of the street as possible? A) in a curved mirror A) Concave mirror B) upside down B) Convex mirror C) twice to reverse the reversed image C) Plane mirror D) three times to reverse the reversed image 7. The image formed by a converging mirror when 8. Convex mirrors always produce virtual images. the object is closer than F is: The image will also be: A) virtual; the reflecting rays intersect A) upright and smaller than the object B) virtual; the reflecting rays do not intersect B) inverted and smaller than the object C) real; the reflecting rays do not intersect C) upright and larger than the object D) real; the reflecting rays intersect D) inverted and larger than the object 9. There is a special incident ray that reflects back 10. A convex mirror has a wider field of view than a on itself. At what angle should you aim an plane mirror because the reflected image: incident ray to the reflecting surface in order for A) is virtual the reflected ray to reflect back on itself? B) appears to be behind the mirror A) 38° C) 90° C) is inverted, as images in concave mirrors are B) 52° D) 155° D) is smaller, allowing more to fill the mirror 11. The speed of light is 2.04 × 108 m/s in vegetable 12. The index of refraction of glass is 1.52. The oil. What is its index of refraction? speed of light in glass is: A) 1.47 C) 1.49 A) 5.07 × 108 m/s C) 1.97 × 108 m/s B) 2.42 D) 2.01 B) 3.34 × 108 m/s D) 5.07 × 107 m/s 13. A company has developed a new material for an 14. There is a shiny patch on the road ahead where optical fiber. The critical angle of this material is the ground is colder than the air just above it. Is greater than other materials currently being it a mirage or should you slow down for ice? used. Will this product be successful? A) Slow down; mirages occur when air close to A) No, the critical angle should be small the ground is warmer than the air above it B) No, materials currently used work just fine B) Slow down; mirages only occur at night C) Yes, the critical angle should be large C) Road is clear; air is too cold for ice to form D) There is not enough information to tell D) Road is clear; ice can’t form on a highway 7 Physics Review P10 15. You want to produce a virtual image with a 16. When light passes from one medium to another converging lens. Where do you place the object? and slows down, it refracts: A) Closer than F A) towards the normal B) Between F and 2F B) away from the normal C) Beyond 2F C) along the surface D) This is impossible D) towards the surface 17. If you were on a desert island, what kind of lens 18. When parallel rays pass through a diverging lens, could you use to make a fire? the rays will: A) Diverging A) spread out B) Converging B) come together 19. The human eye refracts light onto the: 20. Astigmatism is caused by an irregularly shaped: A) lens A) lens B) cornea B) cornea C) optic nerve C) optic nerve D) pupil D) pupil 21. Nearsightedness can be corrected using: 22. If the eyeball is too short (hyperopia): A) a converging lens A) close objects to appear blurry B) a diverging lens B) far objects to appear blurry C) a combination of lenses C) light converges before the retina D) nothing; it cannot be corrected D) light converges on the optic nerve Ray Diagrams 23. Draw the ray diagram to determine the location of the image and describe its SAT characteristics. 8