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 within the film, is:
A) $\lambda$
B) 3$\lambda$/4
C) $\lambda$/2
D) $\lambda$/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 within the film, is: 
A) $\lambda$ 
B) 3$\lambda$/4 
C) $\lambda$/2 
D) $\lambda$/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 within the film, is: 
A) $\lambda$ 
B) 3$\lambda$/4 
C) $\lambda$/2 
D) $\lambda$/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 $\lambda$