Fringe Spacing Formula (Young's Double - Slit)
Formula: Δ x = (Dλ)/(d), where Δ x is the distance between adjacent bright (or dark) fringe centers, D is the distance from the slits to the screen, d is the s…
Syllabus path: Optics › Physical Optics › Interference
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CSCA Physics Formula Reference
Formula and explanation
Formula: Δ x = (Dλ)/(d), where Δ x is the distance between adjacent bright (or dark) fringe centers, D is the distance from the slits to the screen, d is the slit separation, and λ is the wavelength. Conditions: Monochromatic light, small - angle approximation ( sin θ ≈ tan θ ≈ θ ), D d. Explanation: The fringe spacing is proportional to the wavelength and inversely proportional to the slit separation.
Related tutorial and examples
Interference
Topic: Optics > Physical Optics > Interference Interference 1. Conceptual Definition Interference is the core of wave optics, referring to the phenomenon where two or more coherent waves superimpose in space to form stable patterns of bright and dark fringes. Key Exam Point: Cohe…
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