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(B) Let the intensity of the incident light be $I_0$. When light passes through the first polaroid,its intensity becomes $I_1 = I_0/2$ (assuming unpol

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$1/32$

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(B) Let the intensity of the incident light be $I_0$. When light passes through the first polaroid,its intensity becomes $I_1 = I_0/2$ (assuming unpolarized light). For the second polaroid,the angle between the transmission axis and the incident light is $	heta = 60^{\circ}$. According to Malus' Law,$I_2 = I_1 \cos^2(60^{\circ}) = (I_0/2) 	imes (1/2)^2 = I_0/8$. For the third polaroid,the angle between its transmission axis and the second polaroid's axis is also $	heta = 60^{\circ}$. Thus,$I_3 = I_2 \cos^2(60^{\circ}) = (I_0/8) 	imes (1/2)^2 = I_0/32$. The fraction of the incident light intensity that passes through the system is $I_3/I_0 = 1/32$.

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