Question

unpolarised light of intensity 32 wm 2 passes through three polarizers such that transmission axis of the last polarizer is crossed with that of the first. The intensity of final emerging light will be...........
(a) 32Wm^-2
(b) 3 Wm^-2
(c) 8 Wm^-2
(d) 4 Wm^-2 ​

Answer 1

here's your answer in the given attachment