Consider a horizontal plane of thin film with
a thickness t. This film is located in between
air and water (see sketch). Light is directed
from the air downward through the film and
into the water, perpendicular to the surfaces.
The index of refraction of the film n1 = 1.5.
The index of refraction of water is n2 = 1.33.
The smallest non-zero thickness tmin leading
to no reflection is
a thickness t. This film is located in between
air and water (see sketch). Light is directed
from the air downward through the film and
into the water, perpendicular to the surfaces.
The index of refraction of the film n1 = 1.5.
The index of refraction of water is n2 = 1.33.
The smallest non-zero thickness tmin leading
to no reflection is