Question

The slits in YDSE have equal width and source is placed symmetrically wrt the slits.the inensity at the centre of the screen is Io.what will be the intensity at the centere if one of theslits is closed ??

Answer 1

The detailed operation of a cipher is controlled both by the algorithm and in each instance by a "key". The key is a secret ( ideally known only to the communicants),