Question

The angular width of the central maximum of the diffraction pattern in a single slit of width a experiment, with $\lambda$ as the wavelength of light, is

• A. $\frac{3\lambda }{2a}$
• B. $\frac{\lambda }{2a}$
• C. $\frac{2\lambda }{a}$
• D. $\frac{\lambda }{a}$

Answer 1

Answer: (C)

$\frac{2\lambda }{a}$

Answer 2

The central maxima lies between the first minima on both sides.
The angular width of central maxima
$=2 \theta=\frac{2 \lambda}{a}$.