Light with intensity I0 enters a series of two polarizing filters. The first is oriented 20° clockwise from vertical and the second is oriented 20° counterclockwise from vertical. (i) If the initial light is unpolarized, find the light intensity after passing through both filters (in terms of I0). (ii) If the initial light were vertically polarized (same intensity I0), would your answer to (a) change? If so, find the new intensity. If not, then explain why.

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