Figure 5.
Bending of light by refraction.
c. Diffraction.
If that same beam of light is shown on an
object, it will not cast a perfect shadow.
The light rays tend to
bend around the object and decrease the size of the shadow.
This
also happens to a radio wave that strikes an object such as a
mountain. The radio wave tends to bend around the object. This is
shown in figure 6.
8
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