Question: Our discussion of the techniques for determining constructive and destructive interference by reflection from a thin film in air has been confined to rays striking

Our discussion of the techniques for determining constructive and destructive interference by reflection from a thin film in air has been confined to rays striking the film at nearly normal incidence. What If? Assume that a ray is incident at an angle of 30.0° (relative to the normal) on a film with index of refraction 1.38. Calculate the minimum thickness for constructive interference of sodium light with a wavelength of 590 nm.

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At entrance 100 sin 300 138 sin 0 Call the unknown thickness Then cos 212 tan 212 b sin 8 b2ttan 212 ... View full answer

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