Diffraction

Diffraction

1. definition

   • Any bending of light by means other than reflection and refraction

2. Examples

   • * the pencil in the glass of water * sound can be heared arround a corner due to diffraction

3. What is diffaction ?

   • is a property of all kinds of waves , including sound and light waves .

4. what ocurrs when the size changes ?

   • 1. if the size of an object is about the same wavelenght of light , it will blur the image.
     • 2. If the object is smaller than the wavelenght of light , then no structire can be seen.
       • this causes the image to be lost, due to diffraction

5. diffraction fringers

   • are evident in the shadows of monochromatic ( single frequency ) light.
     • these fringers would be filled by multitudes of other fringers if the source were white light.