00:01
What's the minimum number of sheets required? so we're going to need a certain amount of sheets to rotate because we can't rotate with just one sheet.
00:10
If we have just one sheet with its polarizing direction at angle 90, no radiation is transmitted.
00:18
So we can use at least two sheets.
00:22
We place the first sheet at some angle theta and the second sheet with its polarizing direction at 90 degrees.
00:29
So then the intensity would be i .0, cosine squared theta, cosine squared, 90 minus theta, which is just equal to i .0, cosine squared theta, sine squared theta, sine squared theta.
00:47
So we can use at least two sheets.
00:53
Now, we'd like to, what's the minimum number of sheets required for the transmitted intensity to be more than 60 % of the original? so we can consider a certain amount of sheets.
01:08
Let's just say n amount of sheets...