You are observing light interference from the top of a soap bubble that is resting on a countertop. The Index of refraction of the soap bubble is n = 1.38. At this moment, the reflection in the soap bubblehas a wavelength of λ = 5.39e-07 meters.Soap BubbleWhiteLightOneColorYour eyeWhat is the THINDEST film that can produce this color? d = 97.5X meters.As time goes on, the soapy water accumulates near the bottom of the bubble making the top VERY VERY thin (d « A). What happens at this point?O NO reflectionO Shorter wavelength (more RED) reflectionO Shorter wavelength (more VIOLET) reflectionO Longer wavelength (more VIOLET) reflectionO WHITE reflectionO Longer wavelength (more RED) reflection

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Answered: You are observing light interference…

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Soap water with index of refraction = 1.33 forms a 3.74E-7 m thick film in air. What is the longest wavelength of visible light (ranging from 3.80E-7 m to 7.50E-7 m) that is most strongly reflected from the film (in m).
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Ch. 34
Mourning doves have a small batch of iridescent feathers. The color isproduced by a 260-nm-thick layer of keratin (n = 1.56), with air on both sides that are found around the edge of the feather barbules. For what visible wavelength (or wavelengths) would this structure produce constructive interference? A) 686nm, 412nmB) 406nmC) 686nm, 541nm, 412nmD) 541nmE) 1622nm, 811nm, 270nm
answer for a i) ii)
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