freshd

Latest Activity

1. How does an O2 sat monitor work?

   freshd replied to NTPinky's topic in General Students

   Hiya, first post - sorry if i'm a little vague, as I'm don't fully comprehend how these things work myself (not a physicist). So, from what I gather, the LED (light emitting diode) in the finger thingy (the technical term) sends out 2 wavelengths of ...