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Questions and Answers
Which scientist coined the term 'diffraction' and made accurate observations of the phenomenon in 1660?
Which scientist coined the term 'diffraction' and made accurate observations of the phenomenon in 1660?
- Francesco Maria Grimaldi (correct)
- Albert Einstein
- Galileo Galilei
- Isaac Newton
What is diffraction?
What is diffraction?
- The bending of waves around the corners of an obstacle or through an aperture (correct)
- The absorption of waves by a medium
- The generation of waves by a source
- The reflection of waves off a surface
Which principle describes the diffraction phenomenon in classical physics?
Which principle describes the diffraction phenomenon in classical physics?
- Bohr's Atomic Model
- Einstein's Theory of Relativity
- Newton's Law of Motion
- Huygens–Fresnel principle (correct)
When is the characteristic bending pattern of diffraction most pronounced?
When is the characteristic bending pattern of diffraction most pronounced?
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What happens when different points on a wavefront interfere in diffraction?
What happens when different points on a wavefront interfere in diffraction?
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Study Notes
Diffraction and Its Origins
- The term "diffraction" was coined by physicist Christiaan Huygens in 1660 after making accurate observations of the phenomenon.
Definition of Diffraction
- Diffraction is the bending and spreading of waves, particularly light waves, as they encounter obstacles or pass through openings.
Principle of Diffraction
- Huygens' Principle describes the diffraction phenomenon, stating that every point on a wavefront acts as a source of secondary wavelets, which propagate outward.
Conditions for Pronounced Diffraction
- The characteristic bending pattern of diffraction is most pronounced when the size of the obstacle or opening is comparable to the wavelength of the wave being diffracted.
Interference in Diffraction
- When different points on a wavefront interfere in diffraction, they create a pattern of constructive and destructive interference, leading to regions of varying intensity.
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