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Question 5 Question: Notyet answered Light is incident on a thin film in air at an angle that is perpendicular to the surface of the film. The film has a refractive index of 1.744, and the light has a wavelength of 471.2 nm in a vacuum. Marked out of Part 1) 1.00 What is the wavelength of the light in the film? Flag question An = nm Part 2) What is the minimum thickness that the film needs to be such that it appears bright to an overhead observer? L = nm Part 3) White light is now incident onto the film (refractive index is still 1.744) but the film is now 113.71 nm thick. What is the longest wavelength of light that is not longer than the visible spectrum (i.e. wavelengths that are less than or equal to 700 nm) that will result in constructive interference for an overhead observer? 1 = nm revious page Next page