Question

A Young's double slit experiment has the screen placed 2.6 m from the double slits where the spacing between the two slits is 0.03 mm. 16) The angle that locates the second-order bright fringe is 2.0degree. Find the wavelength of the light? 17) Find the distance y on the screen between the central bright fringe and the second-order bright fringe.

Answer 1

^{a)dsinθ = mλ}

^{0.03*10^-3*sin2 = 2*λ   => λ= 13.5*10^-6 m = 13.5μm}

^{b) tanθ = y/D}

^{y=Dsinθ = 2.6*sin2 = 0.0907 m}