a puddle of water has a thin film of gasoline floating on it. A beam of light is
ID: 1769359 • Letter: A
Question
a puddle of water has a thin film of gasoline floating on it. A beam of light is shining perpendicular on the fil,. If the wavelength of light incident on the film is 560 nm and the indices of refraction of gasoline and water are 1.40 and 1.33 respectively, what is the minimum thickness of the film to see a bright reflection? a puddle of water has a thin film of gasoline floating on it. A beam of light is shining perpendicular on the fil,. If the wavelength of light incident on the film is 560 nm and the indices of refraction of gasoline and water are 1.40 and 1.33 respectively, what is the minimum thickness of the film to see a bright reflection?Explanation / Answer
t = lamda(vacuum) / 4n
= 560 / 4(1.4)
= 100nm
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