1. The problem statement, all variables and given/known data 2. Relevant equations 3. The attempt at a solution a) see attached. b) i) Decreasing the width of the slit will cause less interference fringes to be seen, increases the distance amongst fringes and the fringes become wider. ii) If the screen was moved further away, fewer fringes will be visible on the screen, increased the distance amongst bright fringes, and the fringes that are developing the interference pattern become wider. iii) Increasing the wave length will cause the fringes that make up the interference pattern become wider, less fringes visible on the screen and an increased distance amongst bright fringes. c) i) A double slit with a light shone through it will result in having the interference pattern being evenly spread out and have like intensities. ii) Light shone through diffraction grating will result in evenly brighter fringes that are widely spaced and narrower. I was wondering if there's anything that i missed? I feel I have it all but I just want to be sure. Also, for questions B and C, i had a hard time learning the concepts during class as the videos my teacher showed hurt my eyess so it was kind of hard to see the differences in the waves/ dark and bright fringes.