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LIGHT WAVES

CONTENT

  1. The Concept of Light
  2. The Nature of light
  3. The Sources of Light
  4. The Properties of Light
  5. The Transmission of Light
  6. The Rays and Beams of Light
  7. Rectilinear Propagation of Light
  8. Shadows
  9. 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.

Lesson tags: Physics Lesson Notes, Physics Objective Questions, SS2 Physics, SS2 Physics Evaluation Questions, SS2 Physics Evaluation Questions Third Term, SS2 Physics Objective Questions, SS2 Physics Objective Questions Third Term, SS2 Physics Third Term
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