Question

In the diffraction pattern due to a single slit, the width of the central maximum will be:

• A. Larger for narrow slit
• B. Less for narrow slit
• C. Larger for wide slit
• D. Less for wide slit

Hint:

In single-slit diffraction, reducing the slit width increases the width of the central maximum.

Answer 1

The Correct Option is A

The central maximum width in single-slit diffraction is given by:
\[ w = \frac{2 \lambda D}{a} \] where:
- \( \lambda \) = Wavelength of light
- \( D \) = Distance between slit and screen
- \( a \) = Slit width
Since \( w \propto \frac{1}{a} \), a narrow slit (small \( a \)) gives a larger central maximum.