Hi guys, i have problem with Interference in Thin Films, i tried worked the solution not sure it is correct. Hope someone can help me check? Also there is some part on the topic i dont quite follow, 2t is the extra distance travelled inside the film, then is 2t is also rough estimate of wavelenth? 1. The problem statement, all variables and given/known data A soap bubble (n = 1.33) is floating in air. If the thickness of the bubble wall is 115 nm, what is the wavelength of the light that is most strongly reflected? 3. The attempt at a solution the worked solution by me is in attachment. Thank you.