Dark Fringe Condition for Single - Slit Fraunhofer Diffraction
Formula: a sin θ = k λ, k = ± 1, ± 2, ± 3, Applicable Conditions: Parallel light incident normally on a single slit, observed at infinity (or on the focal plan…
Syllabus path: Optics › Physical Optics › Diffraction
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CSCA Physics Formula Reference
Formula and explanation
Formula: a sin θ = k λ, k = ± 1, ± 2, ± 3, Applicable Conditions: Parallel light incident normally on a single slit, observed at infinity (or on the focal plane of a lens). Explanation: Dark fringes appear on the screen when the diffraction angle θ satisfies this condition. 'a' is the slit width, 'λ' is the wavelength of light, and 'k' is the order of the dark fringe.
Related tutorial and examples
Diffraction
Topic: Optics > Physical Optics > Diffraction Diffraction 1. Conceptual Definition Diffraction is the phenomenon where light bends around the edges of an obstacle or passes through a small aperture, entering the geometric shadow. It is direct evidence of the Wave Nature of light.…
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