Question

Angular width of central maxima of a diffraction pattern of a single slit does not depend upon

• A. Distance between slit and source
• B. Wavelength of the light used
• C. Width of slit
• D. Frequency of light used

Answer 1

The correct option is A Distance between slit and source

For single slit diffraction pattern e sin $\theta$ = $\lambda$ Angular width, e = slit width
$\therefore$ $\theta$ = sin${}^{-1}\left(\frac{\lambda }{e}\right)$
It is independent of D, distance between screen and slit.