So I got a warning for just posting questions so I'll do as best as I can to try and put effort lol 1. The problem statement, all variables and given/known data A Young's interference experiment is performed with monochromatic light. The separation between the slits, d, is .50 mm, and the interference pattern on a screen L = 3.3 m away shows the first maximum y1 = 3.4 mm from the center of the pattern. What is the wavelength? GIVEN DATA d=.50mm L=3.3m y1= 3.4mm 2. Relevant equations Yn=(nλL)/d 3. The attempt at a solution I need to know if I'm attempting this right. I started off by plugging in y1=3.4mm, L=3.3m and d=.50mm Pretty simple. 3.4=(nλ3.3)/.5 1.7=(nλ3.3) .5151.....=λ ??? Am I right by plugging in 1 for n???