Monochromatic Light of Wavelength $\lambda$ _film Is Normally Incident on a Soap Film in Air

question 57

Multiple Choice

Monochromatic light of wavelength $\lambda$ _film is normally incident on a soap film in air. In terms of the wavelength, what is the thickness of the thinnest film for which the intensity of the reflected light will be a maximum?

• A)\(\lambda\)_film/4
• B)\(\lambda\)_film/2
• C)3 \(\lambda\)_film/4
• D)\(\lambda\)_film
• E)3 \(\lambda\)_film/2

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