Engineers are testing a new thin-film coating whose index of refraction is less than that of glass. They deposit a 480-nm-thick layer on glass, then shine lasers on it. A red laser with a wavelength of 640 nm has no reflection at all, but a violet laser with a wavelength of 400 nm has a maximum reflection. How the coating behaves at other wavelengths is unknown. ▾ Part A What is the coating's index of refraction? ne 11 V ΑΣΦ ?
Engineers are testing a new thin-film coating whose index of refraction is less than that of glass. They deposit a 480-nm-thick layer on glass, then shine lasers on it. A red laser with a wavelength of 640 nm has no reflection at all, but a violet laser with a wavelength of 400 nm has a maximum reflection. How the coating behaves at other wavelengths is unknown. ▾ Part A What is the coating's index of refraction? ne 11 V ΑΣΦ ?
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Transcribed Image Text:Engineers are testing a new thin-film coating whose index of
refraction is less than that of glass. They deposit a
480-nm-thick layer on glass, then shine lasers on it. A red
laser with a wavelength of 640 nm has no reflection at all,
but a violet laser with a wavelength of 400 nm has a
maximum reflection. How the coating behaves at other
wavelengths is unknown.
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Part A
What is the coating's index of refraction?
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V
ΑΣΦ
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