LIGHT WAVES
CONTENT
- The Concept of Light
- The Nature of light
- The Sources of Light
- The Properties of Light
- The Transmission of Light
- The Rays and Beams of Light
- Rectilinear Propagation of Light
- Shadows
- Eclipses
The Concept of Light
Light (optics) is a form of energy which causes the sensation of vision. This energy association with light is known as luminous energy and it is the energy which causes the sensation of vision when it falls on our eyes.
The Nature of light
As you know, there are two views about the nature of light namely;
(i) Light as particle (Corpuscular theory);
(ii) Light as matters (Wave theory);
According to the corpuscular theory light consists of a stream of minute weightless particles given off by the source. On the basis of this theory, interference and diffraction of light cannot be explained while the photoelectric effect could be explained satisfactorily by assuming that light exists in discrete particles known as photons.
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