Two glass plates, each with an index of refraction of 1.55, are separated by a small distance D. The space between the plates is filled with water (n = 1.33) as shown. For which one of the following conditions will the reflected light appear green?
Note: The wavelength of green light is 460 nm in vacuum.

Options

A. `D=((460 nm)/(2))`
B. `2D=(1)/(2)((460 nm)/(1.33))`
C. `2D=((460 nm)/(1.33))`
D. `2D=(1)/(2)((460 nm)/(1.55))`

Answer

B