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Part D - A lication Full Solutions are Re uired [20 marks] 18. Consider a soap lm that is the thinnest lm that will produce
Part D - A lication Full Solutions are Re uired [20 marks] 18. Consider a soap lm that is the thinnest lm that will produce a bright blue light when illuminated with the white light. The index of refraction of the soap lm is 1.35 and the blue light is monochromatic with wavelength 41 1 nm. a) Calculate the thickness of the lm if the soap covers a piece of crown glass with index of refraction of 1.52. [2 marks] air "air = 1.00 soap film nm = 1.35 glass \"am = 1.52 Suppose the reections occur instead from the soap film on water with index of refraction of 1.33. Determine the thickness of the film on the water that will produce the same blue colour of reected light. [2 marks]
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