Okay so Tommorow I'll be using Newtons Rings experiment to work out the wavelength of sodium light.
I was reading my notes and something is unclear.
It says once you see the rings under the microscope from the central dark circle you count N number of rings from the left hand side and N number of rings on the right hand side. Yeah I understand that bit. But where am i supposed to be measuring from, is it always from the central dark circle to the edge of each adjacent ring.
From example. Central ring to 2nd ring, Central ring to 3rd ring, Central ring to 4th ring.
Or is it Central ring to 2nd ring, 2nd ring to 3rd ring, 3rd ring to 4th ring.
And is it from the outside edge of one ring to the corresponding outside edge of the next ring that I need to be measuring the distance of?
Thanks for help, it's slightly confusing to me.