Young’s double-slit experiment is performed with blue and green light of wavelengths 4360 Å and 5460 Å, respectively. If x is the distance of fourth maxima from centre, then:
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Young’s double-slit experiment is performed with blue and green light of wavelengths 4360 Å and 5460 Å, respectively. If x is the distance of fourth maxima from centre, then:

G1 Physics · Accepted Answer

Step 1: For same order n, bright fringe position xₙ = nλD/d. Step 2: Thus xₙ is directly proportional to λ. Step 3: Blue 4360 Å < green 5460 Å. Hence x_blue < x_green. Final answer: (C).