Need help with the attached question in the picture A lens is to be coated with a thin film with an index of refraction of 1.2 inorder to reduce the reflection from its surface at 2= 550 nm. The glass of theLensno=1.0n2=1.4lens has an index of refraction of 1.4.(a) What is the minimum thickness of the coating that will minimize theintensity of the reflected light?(b) In the above case the intensity of the reflected light is small but not zero.Explain.(c) What needs to be changed, and by how much, to make the intensity of thereflected light zero?Filmn,=1.2

(a). The path difference in the above system is, ∆x=λ2 Thus, For destructive interference,…

A lens is to be coated with a thin film with an index of refraction of 1.2 in order to reduce the reflection from its surface at 2= 550 nm. The glass of the lens has an index of refraction of 1.4. Lens n2=1.4 no=1.0 (a) What is the minimum thickness of the coating that will minimize the intensity of the reflected light? (b) In the above case the intensity of the reflected light is small but not zero. Explain. (c) What needs to be changed, and by how much, to make the intensity of the reflected light zero? Film n,=1.2

A lens is to be coated with a thin film with an index of refraction of 1.2 in order to reduce the reflection from its surface at 2= 550 nm. The glass of the lens has an index of refraction of 1.4. Lens n2=1.4 no=1.0 (a) What is the minimum thickness of the coating that will minimize the intensity of the reflected light? (b) In the above case the intensity of the reflected light is small but not zero. Explain. (c) What needs to be changed, and by how much, to make the intensity of the reflected light zero? Film n,=1.2