Red light is viewed through a thin vertical soap film.At the third dark area shown, the thickness of the film, in terms of the wavelength $\lambda$within the film, is:
A)"$\lambda$/4"
B)"$\lambda$/2"
C)"$\lambda$"
D)"3$\lambda$/4"
E)"5$\lambda$/4"

Question

Red light is viewed through a thin vertical soap film.At the third dark area shown, the thickness of the film, in terms of the wavelength $\lambda$within the film, is: 
A)"$\lambda$/4" 
B)"$\lambda$/2" 
C)"$\lambda$" 
D)"3$\lambda$/4" 
E)"5$\lambda$/4"

Quizplus · Accepted Answer

The Answer of Red light is viewed through a thin vertical soap film.At the third dark area shown, the thickness of the film, in terms of the wavelength $\lambda$within the film, is: 
A)"$\lambda$/4" 
B)"$\lambda$/2" 
C)"$\lambda$" 
D)"3$\lambda$/4" 
E)"5$\lambda$/4"

Red Light Is Viewed Through a Thin Vertical Soap Film λ\lambdaλ

Red Light Is Viewed Through a Thin Vertical Soap Film $\lambda$