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University Physics Volume 3

Introduction

University Physics Volume 3Introduction
The figure is a photograph taken from underwater. The photo shows an underwater swimmer. Above the swimmer is an upside down image of the swimmer and of the activities on the deck, outside the pool.
Figure 1.1 Due to total internal reflection, an underwater swimmer’s image is reflected back into the water where the camera is located. The circular ripple in the image center is actually on the water surface. Due to the viewing angle, total internal reflection is not occurring at the top edge of this image, and we can see a view of activities on the pool deck. (credit: modification of work by “jayhem”/Flickr)

Chapter Outline

1.1 The Propagation of Light
1.2 The Law of Reflection
1.3 Refraction
1.4 Total Internal Reflection
1.5 Dispersion
1.6 Huygens’s Principle
1.7 Polarization

Our investigation of light revolves around two questions of fundamental importance: (1) What is the nature of light, and (2) how does light behave under various circumstances? Answers to these questions can be found in Maxwell’s equations (in Electromagnetic Waves), which predict the existence of electromagnetic waves and their behavior. Examples of light include radio and infrared waves, visible light, ultraviolet radiation, and X-rays. Interestingly, not all light phenomena can be explained by Maxwell’s theory. Experiments performed early in the twentieth century showed that light has corpuscular, or particle-like, properties. The idea that light can display both wave and particle characteristics is called wave-particle duality, which is examined in Photons and Matter Waves.

In this chapter, we study the basic properties of light. In the next few chapters, we investigate the behavior of light when it interacts with optical devices such as mirrors, lenses, and apertures.

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