The double-slit experiment, carried out in 1801, proves that light is a wave. ⇒ Angular width of central maximum = 2θ = 2λ/a Additionally, due to this phenomena, light from coherent sources interferes with itself, resulting in the creation of the diffraction pattern, a recognizable pattern on the screen. The phenomena of light bending or diffraction may be seen in single-slit diffraction. Λ is the wavelength of the projected lightĭ is the distance between a slit and a screenĪnd θ is the angle made with the undeviated direction of light. The linear width of central maxima is 2λDa. The angular width of the central maximum is 2θ = 2λ/a The path difference between two rays at an angle θ is given as ∆L= a/2 sin θ (valid only when D> a ) The double-slit experiment patterns differ from the single-slit diffraction pattern as the width and intensity reduce as we move away from the central maximum.
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