00:01
So i'm going to talk about how to find the transmission if you know the absorption value.
00:09
And i'll also talk about how to find the absorption value if you know the percent transmission.
00:14
So absorption and transmission are directly related to one another.
00:21
There is an easy formula for it.
00:23
Its absorption is equal to the log of the transmission.
00:26
Oftentimes you'll find the transmission as a percent value, but you won't put a percent value into your log, you'll put the decimal form instead.
00:34
So let's start off with a problem.
00:36
Let's say that we know our absorption value is 0 .446.
00:42
And we want to know what is our percent transmitted, how much of the frequency got all the way through the sample, basically.
00:52
So in order to figure this out, we're going to have to rearrange our equation up here in order to solve for transmission rather than absorption.
00:59
So first off, we've got to bring the negative to the other side.
01:02
So we'll say negative absorption a is going to be equal to our log of the transmission t.
01:13
In order to cancel out this log value, you're just going to bring this as an exponent of 10...