An experiment is setup to measure the diameter of the sphere in the diagram using sizing measurements based on interference. A thin piece of glass slab is placed one side of a highly reflective substrate. A yellow light created by Sodium wavelength = 589.3nm having a normally incident. Fringes can be observed on the glass from the interference. With a gap between the two bright fringes is measured to be g = 0.118mm, with an overall length for the setup to be L = 20mm. The setup will be placed in air having n = 1. What is the diameter of the sphere? WOT

An experiment is setup to measure the diameter of the sphere in the diagram using sizing measurements based on interference. A thin piece of glass slab is placed one side of a highly reflective substrate. A yellow light created by Sodium wavelength = 589.3nm having a normally incident. Fringes can be observed on the glass from the interference. With a gap between the two bright fringes is measured to be g = 0.118mm, with an overall length for the setup to be L = 20mm. The setup will be placed in air having n = 1. What is the diameter of the sphere? WOT