A source S and a detector D are placed at a distance d apart

Last updated: 6/13/2023

A source S and a detector D are placed at a distance d apart A big cardboard is placed at a distance 2d from the source and the detector as shown in figure 16 E2 The source emits a wave of wavelength d 2 which is received by the detector after reflection from the cardboard It is found to be in phase with the direct wave received from the source By what minimum distance should the cardboard be shifted away so that the reflected wave becomes out of phase with the direct wave S 201