Question

In Young's double slit experiment, the central point on the screen is -

• A. bright
• B. dark
• C. first bright and later dark
• D. first dark and later bright

Hint:

In YDSE, a path difference of zero always results in constructive interference, hence the central point is bright.

Answer 1

The Correct Option is A

In Young's double slit experiment, the central point on the screen corresponds to the point where the path difference between the two interfering waves is zero.
When the path difference is zero: \[ \text{Path difference} = 0 \Rightarrow \text{Constructive interference} \] Therefore, a bright fringe is formed at the central point.