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Introductory Physics Homework Help
The thinnest film in which the reflected light will be a max
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[QUOTE="Any Help, post: 5646957, member: 605286"] [h2]Homework Statement [/h2] [SIZE=4]Monochromatic light, at normal incidence, strikes a thin film in air. If λ denotes the wavelength in the film, what is the thinnest film in which the reflected light will be a maximum? [/SIZE] [LIST] [*] A λ/4 [*] B 3λ/4 [*] C λ [*] D much less than λ [*] E λ/2 [/LIST] [h2]Homework Equations[/h2] n air ∠ n glass so at the first reflection it will cuase a 180° ray out of phase while the second ray reflected from the inside it will stay inphase because n air ∠ n glass so for constructive interference: 2L=odd number*λ/2 [h2]The Attempt at a Solution[/h2] least odd number is one , so L=λ/4 ?? why it is incorrect [/QUOTE]
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The thinnest film in which the reflected light will be a max
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