Why does an excessively thin film appear black in reflected light ?

Assertion: An excessively thin film appear black in reflected light. Reason: The film absorbs all the radiations falling on it.

A light of wavelength 5890Å falls normally on a thin air film. The minimum thickness of the film such that the film appears dark in reflected light is

A light of wavelength 5890Å falls normally on a thin air film. The minimum thickness of the film such that the film appears dark in reflected light is

Statement -1: If an exceedingly thin soap film is seen in reflected light, it may appear dark Statement -2 : There is a phase difference of pi from the rays reflected from front and rear faces of the film.

Statement -1: If an exceedingly thin soap film is seen in reflected light, it may appear dark Statement -2 : Three is a phase difference of pi from the rays reflected from front and rear faces of the film.

Why does chlorophyll appear green in reflected light and red in transmitted light?

Why does chlorophyll appear green in reflected light and red in transmitted light?