Minimum Resolvable Angle for Optical Instruments (Rayleigh Criterion)
Formula: θ R = 1.22 (λ)/(D) Applicable Conditions: Circular aperture (e.g., lens, telescope objective), and the two point sources are incoherent. Explanation:…
Syllabus path: Optics › Physical Optics › Diffraction
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CSCA Physics Formula Reference
Formula and explanation
Formula: θ R = 1.22 (λ)/(D) Applicable Conditions: Circular aperture (e.g., lens, telescope objective), and the two point sources are incoherent. Explanation: According to the Rayleigh criterion, two point sources are just resolvable when the central maximum of the diffraction pattern of one coincides with the first minimum of the diffraction pattern of the other. θ R is the minimum resolvable angle, λ is the wavelength of light, and D is the diameter of the aperture.
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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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