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INTRODUCTION TO LIGHT
The study of phenomena obtained through the perceptions of eye, i.e. 'vision' constitutes geometrical and physical optics. The inquiry into the nature of light has lead us to recognize light as a small part of the Electro-magnetic spectrum on one hand and as the beam of photons on the other, forcing us to accept wave particle duality as the fundamental tenet of nature. The scope of presentation here however is limited at present to the wave nature of light. Later on in "Modern Physics" we shall introduce the necessity of the particle nature of light, in order to understand the interaction of light with matter on atomic and sub-atomic scales.
It is common knowledge that light travels in a straight lineas we can talk about a ray or a pencil or a beam of light. The changes in the path of ray of the light, when it falls on opaque or transperant surfaces, occur according to empirical laws obtained from experiments study of these changes and resulting image formations is the concern of geometrical optics. |
Light 16.1 Laws
of Reflection at plane surfaces Follow @Pinkmonkey_com  |