Question

In single slit diffraction experiment, when the distance of separation between the slit and screen is doubled, the angular separation between fringes

• A. increases
• B. decreases
• C. remains same
• D. first increases and then decreases

Hint:

Angular separation is independent of screen distance in diffraction experiments.

Answer 1

The Correct Option is C

Step 1: Condition for diffraction minima.
\[ \sin\theta = \frac{n\lambda}{a}. \]
Step 2: Dependence of angular separation.
Angular separation depends only on wavelength and slit width, not on screen distance.
Step 3: Conclusion.
Doubling the distance of the screen does not affect angular separation.