Wave Optics

Unpolarised light of intensity 32 Wm\(^{-2}\) passes through the combination of three polaroids such that the pass axis of the last polaroid is perpendicular to that of the pass axis of first polaroid. If intensity of emerging light is 3 Wm\(^{-2}\), then the angle between pass axis of first two polaroids is ______________ \(^\circ\).