A thin film of soap with n = 1.40 hanging in the air reflects dominantly red light with A = 664 nm. Now this film is on a sheet of glass, with n = 1.55. What is the wavelength of the light in air that will now be predominantly reflected?
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![A thin film of soap with n = 1.40 hanging in the air reflects dominantly red light with A = 664 nm. Now this film is on
a sheet of glass, with n = 1.55. What is the wavelength of the light in air that will now be predominantly reflected?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe59a4962-32f7-4f7b-acd1-79a673b40c20%2Fcfac8fbc-7be6-436b-8372-acb4c5b1f2b1%2F2e6nyda_processed.jpeg&w=3840&q=75)
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