diff --git a/300s School/NUCE 2113 - Radiation Detection and Measurement/Laboratory 1.md b/300s School/NUCE 2113 - Radiation Detection and Measurement/Laboratory 1.md
index 6c9c7e97..42e6bb19 100644
--- a/300s School/NUCE 2113 - Radiation Detection and Measurement/Laboratory 1.md	
+++ b/300s School/NUCE 2113 - Radiation Detection and Measurement/Laboratory 1.md	
@@ -14,4 +14,8 @@ Exercise 1.3
 
 | Attenuation | Voltage |
 | ----------- | ------- |
-| 1000/1000   | 5.5V    |
\ No newline at end of file
+| 1000/1000   | 5.38V   |
+| 800/1000    | 4.32V   |
+| 600/1000    | 3.22V   |
+| 400/1000    |         |
+| 200/1000    |         |
\ No newline at end of file