Question

Two thin films of the same material but different thickness are separated by air. Monochromatic light in incident on the first film. When viewed normally from the point $A$, the second film appears dark.
From point $B$, on normal viewing

• A. the first film will appear bright
• B. the first film will appear dark
• C. the second film will appear bright
• D. the second film will appear dark

Answer 1

The correct option is D the second film will appear dark

Due to Destructive Interference of light passing from Film 1 and falling on Film 2, The $2^{nd}$ film will appear dark from both sides.

Answer is D