Interference of Light: Explaining Transparency & Opacity

[SwAnK]

hey found this question in my textbook...
explain using interferance why a super thin film is transparent or invisible in transmitted light but seems to be opaque when viewed with reflected light. Draw a diagram for your solution. any ideas?? i really have no idea. thanks for your time though.

 

[Tide]

HINT: How much reflected light would there be if all the light were transmitted? :)

 

[SwAnK]

if all the light went through wouldn't it be "invisible" but how could it be opaque?, like i guess some reflected rays and incident rays would create destructive interferance, but wouldn't you still be able to see through?

 

[Hootenanny]

Think of what your looking for. (Light that's reflected back or light that goes through)