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+# Systems in the Plane
+
 **Documentation**
 - [<] ME2016 Week 3 Class ⏳ 2024-09-16
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diff --git a/300s School/NUCE 2100 - Fundamentals of Nuclear Engineering/2024-09-10 Module 3.md b/300s School/NUCE 2100 - Fundamentals of Nuclear Engineering/2024-09-10 Module 3.md
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 >
 >* Recall 1 erg = 10-7 joule 
 
-# Module 3.2 - Radiation Damage in Biological Systems
 Concentrations of ionizations within a single cell are more damaging then spread out ionization over many cells.
 Biological damage is proportional to absorbed dose, as well as LET for that type of radiaiton. 
+>[!note] Relative Biological Effectiveness (RBE)
+>Compares biological effects of different types of radiation.
+>$$\text{RBE} = \frac{\text{Dose of 250 keV X-rays producing an effect}}{\text{Dose of reference radiation for same effect}}$$
+>RBE is highly dependent on the type of radiation.
+>The upper limit of the RBE for a specific type of radiation is called the **quality factor**. 
+>Multiplying the absorbed dose by the quality factor gives the effective or **equivalent dose** (QF x rad = rem)
 
-Look at slides from 3.1 Slide 22-24 for more info
+# Module 3.2 - Radiation Damage in Biological Systems
+Ionizing radiation in the body can cause problems in multiple ways. One way is by creating highly reactive free radicals. Water for example breaks down into hydrogen peroxide. Which is really not good for life.
 
 # Module 3.3 - Radiation Protection Standards
 # Module 3.4 - Estimating Radiation Dose Rates