Question Detail
Question
What is the condition for the formation of dark fringes (destructive interference) in Young's double-slit experiment, in terms of path difference Δρ?
Correct Answer
Option C is the correct answer.
Detailed Explanation
On page 3, under 'The condition required for the formation of dark fringes at D...', it lists the path differences as 'λ/2, 3λ/2, 5λ/2...'. This corresponds to half-integer multiples of the wavelength.
Hint
Think about what happens when two waves are exactly out of phase.