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brainyman89
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diffraction takes place when the wavelets are a source of more wavelets that expand in all directions, and the shape of the new wave front is curved. The wavelets of these diffracted, or bent, waves can now travel different paths and subsequently interfere with each other, producing interference patterns.
Then why it is crucial to have size of the opening comparable to or smaller than the wavelength of the incoming wave to get diffraction? what does make wavelets expand in all directions, and the shape of the new wave front is curved? Do Huygens’s Principle explain why these wavelets expand in all directions which makes the shape of the new wave front curved?
Huygens’s Principle states that every point on a wave front of light acts as a source of secondary waves that radiate from their centers. Then why interference does not occur when light is propagating in a straight line thus causing diffraction?
thanks in advance
Then why it is crucial to have size of the opening comparable to or smaller than the wavelength of the incoming wave to get diffraction? what does make wavelets expand in all directions, and the shape of the new wave front is curved? Do Huygens’s Principle explain why these wavelets expand in all directions which makes the shape of the new wave front curved?
Huygens’s Principle states that every point on a wave front of light acts as a source of secondary waves that radiate from their centers. Then why interference does not occur when light is propagating in a straight line thus causing diffraction?
thanks in advance