The intensity at the maximum in a Young's double
slit experiment is ``I_0``. Distance between two slits is
d = 5 ``\lambda``, where ``\lambda`` is the wavelength of light used
in the experiment. What will be the intensity in front
of one of the slits on the screen placed at a distance
D = 10 d ?
(1) ``I_0``
(2)``I_0``/4
(3) 3/4 ``I_0``
(4)``I_0``/2