A piece of glass has a thin film of gasoline floating on it. A beam of light is

Question

A piece of glass has a thin film of gasoline floating on it. A beam of light is shining from air perpendicular on the film. If the wavelength in air of light incident on the film is 560 nm and the indices of refraction of gasoline and glass are 1.40 and 1.50, respectively, what is the minimum thickness of the film to see a bright reflection?

A piece of glass has a thin film of gasoline floating on it. A beam of light is shining from air perpendicular on the film. If the wavelength in air of light incident on the film is 560 nm and the indices of refraction of gasoline and glass are 1.40 and 1.50, respectively, what is the minimum thickness of the film to see a bright reflection?

Explanation / Answer

minimum thickness t = L/4n

t = 560nm/(4*1.5)

t = 93.33 nm

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.