yellow light of wavelength 500mm emitted by single source passe through two narrow slit 1mm apart. How far apart are two adjacent bright fringes when interference is observed on screen 10m away

Question

plz ans with solution.........plz ans quickly with solution......................................................................

Answer 1

Y_m = D (mλ/d) and Y_m+1 = D [(m+1)λ/d] → Two adjacent bright fringe = Y_m+1 - Y_m = Dλ/d

d = 1mm = 10^-3 m , D = 10 m , λ = 500 * 10^-9 m

Y_m+1 - Y_m = Dλ/d → Y_m+1 - Y_m = (10*500*10^-9)/0.001 = 0.005 m = 5 mm



Yellow is 500 nm