Two coherent sources
separated by distance
emit light of wavelength
, in phase as shown. A circular wire of radius
is placed in such a way that
lies in its plane and the mid point of
is at the centre of wire. The angular positions on the wire for which
intensity reduces to half of its maximum
value for the first time is given as
. Find the value of
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would have been much easier if the decimal places have had not been included in the answers...