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$\lambda$

Question

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$\lambda$

Quizplus · Accepted Answer

The Answer of 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$\lambda$

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

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