a plane wavefront of 7000 A^0 Fallson an aperture. the area of half period zone of the diffraction pattern on screen 1 meter away from the aperture will be :(1) 28*10^-7 m^2 (2) 44*10^-7 m^2 (3) 22*10^-7 m^2 (4) 14*10^-6
a plane wavefront of 7000 A^0 Fallson an aperture. the area of half period zone of the diffraction pattern on screen 1 meter away from the aperture will be :
(1) 28*10^-7 m^2 (2) 44*10^-7 m^2 (3) 22*10^-7 m^2 (4) 14*10^-6










