# Physics

Hello!I was wondering if anybody had the time to help me with this question. I am not sure what equation to use with three polarizing filters! I thought we use Malus' Law, but doesnt seem to work. Any help would be greatly appreciated!!

The question: Unpolarized light passes through three polarizing filters. The first one is oriented with a horizontal transmission axis, the second filter has its transmission axis 25.7° from the horizontal, and the third one has a vertical transmission axis. What percent of the light gets through this combination of filters?
a)92.4%
b)50%
c)0%
d)7.6%

What I've done so far:
Malus' Law=I=(I_0)*cos^2(theta)
If theta=25.7,
then I=0.812(I_0)
Times by 100 = 81.2?
Thank you so much in advance!

1. 👍 0
2. 👎 0
3. 👁 120
1. It's 0%, I've done the exact same question, I think there's a typo.

1. 👍 0
2. 👎 0
posted by James
2. It's not 0%

1. 👍 0
2. 👎 0
posted by Tommy

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