Solve the following problems:
Problem I: Calculate the minimum thickness of a soap-bubble film (n = 1.33) that will result in constructive interference in the reflected light if the film is illuminated by light with wavelength 540 nm in free space.
Problem II: Recalculate the minimum thickness for constructive interference when the soap-bubble film is on top of a glass slide with n = 1.5.
Rework your solution from the beginning and check each step carefully.