A CD is made with a plastic coating with index of refraction n and is used with a laser that produces a wavelength $\lambda$ in the plastic. Which of the following pit depths would produce the desired destructive interference in this situation?
A) "$\lambda$/2n"
B) "$\lambda$/4"
C) "$\lambda$/4n"
D) "$\lambda$/2"

Question

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The Answer of A CD is made with a plastic coating with index of refraction n and is used with a laser that produces a wavelength $\lambda$ in the plastic. Which of the following pit depths would produce the desired destructive interference in this situation?
A) "$\lambda$/2n"
B) "$\lambda$/4"
C) "$\lambda$/4n"
D) "$\lambda$/2"

A CD Is Made with a Plastic Coating with Index λ\lambdaλ

A CD Is Made with a Plastic Coating with Index $\lambda$