Two sources of light of wavelength 2500A and 3500A are ised in YDSE simultaneously. Which order of the fringes of two wavelength pattern coincides? Share with your friends Share 2 Sakshi Kanwar answered this Dear Student For bright fringe=nDλdFor the two fringes coincidesn1Dλ1d=n2Dλ2dn1n2=λ2λ1n1/n2=7:5Regards 4 View Full Answer