Two sources of light of wavelength 2500A and 3500A are ised in YDSE simultaneously. Which order of the fringes of two wavelength pattern coincides?

Dear Student

For bright fringe=nDλdFor the two fringes coincidesn1Dλ1d=n2Dλ2dn1n2=λ2λ1n1/n2=7:5Regards

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