My Questions are about Physics

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I have an assignment in physics the question on the PDF,  and some of them on the pics.

1-picture name :number 1 (question number 5).

2-picture name :number  2 (Exercise number 1).

3-picture name :number  3 (Questions for Thought and Discussion number 4).

4-You will find it on the PDF.

5-You will find it on the PDF.

6-You will find it on the PDF.


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PHYS 131 Light and Color Spring 2016 HOMEWORK #4 due FRIDAY 3/11 in class Some questions are written out here and some are from your textbook. Question 5 requires you to print the second page of this assignment document. Submit your answers written neatly on a separate sheet of paper, and be sure to include your NAME and SECTION NUMBER on top of it. This homework is worth 26 points (2 pts per question part). When answering or solving these questions, follow these guidelines: - Write out your reasoning as fully as possible - List all the equations you might be planning to use to obtain your answer, and show all the math steps - Label all units clearly - Include any diagrams or sketches that help you arrive at the answer The more you write out, the more you will learn! This homework goes along with the following book sections: Sections 3.1 – 3.3 and 4.6 – 4.7. You are responsible for understanding this material. Questions: 1. 2. 3. 4. (2 pts) CH 3 Review Question #5 (p. 73) (2 pts) CH 3 Exercise #1 (p. 74) (2 pts) CH 4 Questions for Thought and Discussion #4 (p.100) A candle is 20 cm in front of a convex mirror that has a focal length of -15 cm. a. (2 pts) Use a ray diagram to determine if the image is real OR virtual (choose one), upright OR inverted (choose one), and reduced OR magnified (choose one). The ray diagram drawing counts as part of your answer! b. (2 pts) Now use the mirror equation to find the location of the image (image distance) and the magnification. Your results should agree with part a. 5. Look on page 91 in the textbook, Figure 4.18. For your convenience, that figure is reprinted here, on the second page of this homework. Print it out, and using a ruler and a pencil draw a ray trace directly on the paper, for each case. This makes 5 ray traces total (10 pts). In each ray trace:  Include 3 rays, according to the 3 Golden Rules  Determine where the image will be formed  Neatly write down if the image will be o Magnified or reduced or true size o Virtual or real o Inverted or upright 6. A 2.0 cm tall object is placed 50 cm in front of a converging lens of focal length 10.0 cm. a. (2 pts) What is the image distance? b. (2 pts) What is the magnification? c. (2 pts) Using your answer to part b, what’s the height of the image? GLOSSARY OF TERMS 73 plane of incidence. Plane that includes the incident ray and the normal (per- pendicular) to the surface. reflection. Change of direction (with reversal of the normal component) at a surface. specular reflection. Reflection from a polished surface in which parallel rays remain parallel. virtual image. An image formed by light that appears to come from a cer- tain place. A virtual image cannot be projected onto a screen. Review Questions 1. State the law of reflection and draw a sketch that illustrates this law. 2. Distinguish between specular and diffuse reflection. Give an example of each. 3. Why wouldn't you want to use a specular reflector as a movie screen? 4. Why wouldn't you want to use a diffuse reflector when shaving or ap- plying makeup? 5. Can you “shake hands” with a plane mirror image of either hand? Explain. 6. Why is the lettering seen on the front of many emergency vehicles backwards? 7. Why can you see a spot of light on the wall where a flashlight beam strikes it when you cannot see the flashlight beam itself ? 8. Can the image formed by a concave mirror be either larger or smaller than the object? Explain. 9. Can the image formed by a convex mirror be either larger or smaller than the object? Explain. 10. Is it possible for a convex mirror to form a real image? Explain. 11. Where should a light source be placed with respect to a concave mir- ror to form a searchlight? 12. If the image formed by a convex mirror is closer to the mirror than the object, why do convex mirrors on cars and truck carry the warn- כיי., 3. REFLECTION, MIRRORS, AND KALEIDOSCOPES 4. In the diagram at the right, draw in black all the arrow images that will be formed by only one reflection. A Draw in red the arrow images that will be formed by two reflections. Draw in blue the images that will be formed by three reflections. Exercises 1. Two rays of light from a point source are shown striking a plane mir- ror. Carefully draw the reflected light rays and locate the image of the point source. 2. The figure below shows a plane mirror and two reflected rays of light. 4. REFRACTION OF LIGHT age move closer to, or farther from, the lens? Does the image increase or decrease in size? converging lens to 7. What kind of lens would you place in front of a simple camera to pho. 8. Where must an object be placed with respect to a produce an image one focal length from the lens? 9. What kind of lens is used to correct for myopia (nearsightedness)? 10. What kind of lens is used to correct for hyperopia (farsightedness)? 11. What happens to the image in a pinhole camera if the film or screen is moved farther from the pinhole? 12. What effect does enlarging the hole in a pinhole camera have on the image? Questions for Thought and Discussion 1. A converging lens forms a real inverted image of an object on a screen. What happens to the image if the top half of the lens is covered up? 2. People who are in need of corrective eyeglasses often squint to im- prove their vision. Why may squinting produce temporarily improved vision? 3. Nonprescription sunglasses are often curved, as are automobile wind- shields. Why don't these converge or diverge light rays? verging? 4. How can you quickly determine whether a lens is converging or di- 5. How can you quickly determine the focal length of a convex lens? 6. Explain why the telescope in Figure 4.23, consisting of two convex lenses, inverts the image. Exercises 45 = 0 707 1. Using a calculator, find the sines (sin) of the following angles: 20°, 30°, 45°, 60°, 700, 70°, 80°, and 90°. Make a graph of sine versus 0. 2. Calculate the dispersion at the first surface of a glass nrism In equation 4.2, let the angle of incid
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