A Lens with a Refractive Index of 1 $\lambda$ Denotes the Wavelength of the Incident Light in Air, What

question 37

Multiple Choice

A lens with a refractive index of 1.5 is coated with a material of refractive index 1.2 in order to minimize reflection.If $\lambda$ denotes the wavelength of the incident light in air, what is the thinnest possible such coating?

• A)0.5\(\lambda\)
• B)0.417\(\lambda\)
• C)0.3\(\lambda\)
• D)0.25\(\lambda\)
• E)0.208\(\lambda\)

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