I am trying to design a science experiment involving lasers and want to know if what I am planning to build it technically feasible.
Part of the experiment requires that I make tiny nanometer changes to the apparatus in order to lengthen the time it takes for a beam of light to travel a particular distance. I need to be able to control the distance very accurately because I have to make calculations based on how far the light is travelling.
I'm guessing the weight of the apparatus is roughly a kilogram. What's the smallest reliable distance I can move the apparatus with the specifications I have?