Path difference between two wavefronts emitted from coherent sources is 2.1 μm. Phase difference between the wavefronts at that point is 7.692 π . Wavelength of light emitted by source will be

Question

Path difference between two wavefronts emitted from coherent sources is 2.1 μm. Phase difference between the wavefronts at that point is 7.692 π . Wavelength of light emitted by source will be, 5385 Å, 5600 Å, 5460 Å, 5892 Å

MARKS App · Accepted Answer

Phase difference, ϕ = 2 π x λ or λ = 2 π x ϕ = 2 × π × 2.1 × 10 - 6 7.692 π = 5460 × 10 - 10 m

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