Question Detail
Question
In Young's double-slit experiment, what is the path difference (Δρ) required for constructive interference to occur at point D?
Correct Answer
Option B is the correct answer.
Detailed Explanation
Page 3 states, 'Constructive interference will occur at D when this difference in path length is equal to 0, λ, 2λ, 3λ ... ... ... ... ..., nλ'. This means the path difference must be an integer multiple of the wavelength.
Hint
Recall the conditions for waves to reinforce each other, leading to brightness.