light waves

[SwAnK]

hey found this question in my text book...
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. thanx 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 wouldnt it be "invisible" but how could it be opaque?, like i guess some reflected rays and incident rays would create destructive interferance, but wouldnt you still be able to see through????

[Hootenanny]

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