In Figure assume that the two light waves, of wavelength 620 nm in air, are initially out of phase by rad. The indexes of

In Figure assume that the two light waves, of wavelength 620 nm in air, are initially out of phase by π rad. The indexes of refraction of the media are n1 = 1.45 and n2 = 1.65. What are the

(a) Smallest and

(b) Second smallest value of L that will put the waves exactly in phase once they pass through the two media?