Two slits 4 mm apart, are illuminated by light of wavelength 6000 Å . What will be the fringe width on a screen placed 2 m from the slits?

Step-by-step solution

Separation of slits d=4 ~mm =4 10⁻³ ~m Wavelength =6000 Å=6 10⁻⁷ ~m Distance of screen D=2 ~m Fringe width = D d aligned & = 6 10⁻⁷ 2 4 10⁻³ & =3 10⁻⁴ ~m & =0.3 ~mm aligned