Transcription of RAY OPTICS Introduction
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RAY OPTICS Introduction
1 LESSON RAY OPTICS Introduction Electromagnetic radiation belonging to the region of the electromagnetic spectrum (wavelength of about 400 nm to 750 nm) is called light . Nature has endowed the human eye (retina) with the sensitivity to detect electromagnetic waves within this small range of the electromagnetic spectrum. It is mainly through light and the sense of vision that we know and interpret the world around us. There are two things that is easily identifiable with light 1. light travels with enormous speed and 2. light travels in a straight line. Its presently accepted value in vacuum is c = 108ms 1. For many purposes, it suffices to take c = 3 108ms 1. Note: (i). The speed of light in vacuum is the highest speed attainable in nature.
RAY OPTICS Introduction ... In this chapter, we consider the phenomena of reflection, refraction and dispersion of light, using the ray picture of light. Using the basic laws of reflection and refraction, we shall study the image formation by ... due to refraction of light through the atmosphere. • The refractive index of air with respect to ...
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