Thin lenses lab report conclusion

PHYS 1119 Thin Lenses and Real Images NAME: ________________________________ Experiment 11 SECTION: ____ INTRODUCTION In this investigation, you will explore the formation of real images by convex lenses. You will have the opportunity to project images in various configurations, and explore the variables that affect the appearance, size, and location of a real image. After exploring these phenomena, you will formalize your explanations and develop mathematical relationships describing the phenomena. OBJECTIVES In this experiment, you will • Observe lenses being used to bring images into focus Use simulations to model real image production. • Explore how lens characteristics and the position of the object affect the appearance, orientation, and size of real images. • Determine the relationship between object distance, image distance, focal length and magnification in real images produced by convex lenses. • MATERIALS Logger Pro Vernier Dynamics System track Vernier Optics Expansion Kit Images and Recordings of experiment IMAGE INVESTIGATION OF AN OBJECT LOCATED A LONG WAY AWAY 1. A viewing screen from the Optics Expansion Kit is placed at the 10 cm mark on the Vernier track. The 10 cm double convex lens is placed near the middle of the track as shown in Figure 1. 2. The end of the track with the lens is placed near a window looking outdoors. The lens is moved until a clear image appears on the viewing screen. Figure 1 Advanced Physics with Vernier – Beyond Mechanics ©Vernier Software & Technology 11 - 1 Experiment 11 3. A still image of the screen when the image comes into focus is Zoomed in on the screen. Lens and screen pointing out a window. 4. Describe the size, shape, and orientation of the image as well as the position of the lens when the image is sharp. Answers to the questions as it is hard to see this in the pictures. The 10 cm focal length lens is placed at 10cm to form an image. The 20 cm focal length lens needs to be at 20 cm. This is a real image as it projects onto a screen. It is also inverted (upside down). The object (house in this image) is a long way away. The object distance can be considered to be at infinity. In your lecture class, you will learn how the use of ray diagrams can help you to determine how and where light from a particular point on an object converges to form an image. You can get a conceptual understanding of the process of image-formation by a lens using the Simbucket lens ray tracing program. Simbucket lens ray traces: https://simbucket.com/lensesandmirrors/ 11 - 2 Advanced Physics with Vernier – Beyond Mechanics Thin Lenses and Real Images MEASURED DATA A light source and double convex lens are setup to project a clear image a screen as shown in Figure 2. An illuminated number “4” is used as the “object” for this investigation. The object distance is varied from a large to small distances. At each distance the screen is moved until a sharp image of the number “4” can be seen on the screen. The position of the screen is used to measure the image distance. Figure 2 2. Describe the size, shape, and orientation of the image at object distance 6. 2 cm Zoomed image. Each line is 1 mm Object Advanced Physics with Vernier – Beyond Mechanics 11 - 3 Experiment 11 3. The lens was moved to various distances from the object. The screen was then moved until a sharp image of the “4” appears on the screen. The distance between the light source and the lens as “object distance” and the distance between the lens and the screen as “image distance” are recorded in the following table.