Questions and Answers
Which scientist coined the word diffraction and made accurate observations of the phenomenon in 1660?
Francesco Maria Grimaldi
How is diffraction described in classical physics?
As the collection of individual spherical wavelets
When is the characteristic bending pattern of diffraction most pronounced?
When a wave from a coherent source encounters a slit/aperture comparable in size to its wavelength
What principle describes the diffraction phenomenon in classical physics?
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What is the interference or bending of waves around the corners of an obstacle or through an aperture called?
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Study Notes
Diffraction
- The term "diffraction" was coined by Italian scientist Francesco Maria Grimaldi in 1660, who made accurate observations of the phenomenon.
- In classical physics, diffraction is described as the bending of waves around corners or through small openings, resulting in the spreading of waves beyond their original path.
- The characteristic bending pattern of diffraction is most pronounced when the wavelength of the wave is comparable to the size of the obstacle or aperture.
- The diffraction phenomenon in classical physics is described by Fermat's principle, which states that the path taken by a wave between two points is the path that requires the least time.
- The interference or bending of waves around the corners of an obstacle or through an aperture is called diffraction.
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