Diffraction of Light
Ανέβηκε στις 30 Απρ 2010
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What is Diffraction of Light
Diffraction
is the bending of light as it passes the edge of an object. An example
of this property is the shadow. If observed carefully, the edges of
shadows are not solid, but slightly fuzzy.
So, what is going on?
Diffraction can be easily explained with Huygens' Principle. Just as the
front of a wave passes the edge of an object, the wavelets will cause
the succeeding front to bend around the edge.
For some time, it
was believed that the bending of light was not due to light itself, but
the edge of the object. Not until the British Physicist, Thomas Young,
conducted the double slit experiment before light was accepted as a
wave.
In his experiment, he made two slits on a barrier and
allowed monochromatic light (light of a single wavelength) to pass
through. The result is a series of light and dark areas on the screen
that could not be explained under the particle model of light. Under the
wave model of light, these light and dark areas can be explained with
constructive and destructive interference of waves.
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What is Diffraction of Light
Diffraction
is the bending of light as it passes the edge of an object. An example
of this property is the shadow. If observed carefully, the edges of
shadows are not solid, but slightly fuzzy.
So, what is going on?
Diffraction can be easily explained with Huygens' Principle. Just as the
front of a wave passes the edge of an object, the wavelets will cause
the succeeding front to bend around the edge.
For some time, it
was believed that the bending of light was not due to light itself, but
the edge of the object. Not until the British Physicist, Thomas Young,
conducted the double slit experiment before light was accepted as a
wave.
In his experiment, he made two slits on a barrier and
allowed monochromatic light (light of a single wavelength) to pass
through. The result is a series of light and dark areas on the screen
that could not be explained under the particle model of light. Under the
wave model of light, these light and dark areas can be explained with
constructive and destructive interference of waves.
Please like our facebook page
http://www.facebook.com/tutorvista
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