Light of wavelength 547nm is incident perpendicularly on a soap film (n=1.31) suspended in air. What is the smallest nonzero film thickness for which reflected light undergoes constructive interference?
2t = (m + 1/2)(wavelength/nfilm)
The Attempt at a Solution
t = (0+1/2)(547nm/(2*1.31))
t = 104 nm
Is this correct?
Could someone please check this as well: https://www.physicsforums.com/showthread.php?t=310439