Practice portal › Wave Optics › Interference and Young's Double Slit Experiment
Asked in GSEB Board July 2021 · Intensity and coherent sources
Given: phase difference Δφ=6π rad between two waves.
Idea: a path difference of one whole wavelength puts the waves 2π out of phase, so the two are tied by Δ x=λ/(2π)Δφ.
Δ x=λ/(2π)×6π.
Δ x=3λ.
Three whole wavelengths is an even multiple of λ/2, so the two waves arrive in step and the point is bright.
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