Question

light travelling in air is incident on a soap bubble. If the path difference through the soap bubble is 2.5λ:
a) constructive interference will occur
b) destructive interference will occur
c) partial interference will occur
d) none of the above

Answer 1

Constructive interference will occur, cos
constructive interference occurs wen d path difference btw identical waves at a point is n¦Ë...where n = 0,1,2,3...
Destructive interference occur wen d path difference btw two identical waves at a point is n¦Ë 1/2¦Ë where n = 1,2,3,4...