In YDSE, the angular width of a fringe formed an a distant screen is 10 . The wavelength of light used is 6000 A0 . The spacing between the slits is

Angular fringe width θ=10=π180 rad Wavelength λ=6000 A0=6000×10−10 m Slit distance d=?                       d=λθ                         =6×10−710                        =6×10−70.0175                        =0.0344×10−3m                ∴   d=0.0344 mm