A point source \( S \) emits unpolarized light uniformly in all directions. At two points \( A \) and \( B \), the ratio \( r = \frac{I_A}{I_B} \) of the intensities of light is \( 2 \). If a set of two polaroids having \( 45^\circ \) angle between their pass-axes is placed just before point \( B \), then the new value of \( r \) will be ________.
