Question

Angular width (β) of central maximum of a diffraction pattern on a single slit does not depend upon.

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

Answer 1

Answer: (A)

Distance between slit and source

Answer 2

For single slit diffraction pattern $d\sin\theta = \lambda$

($d =$slit width)

Angular width = $2\theta = 2\sin^{- 1}\left( \frac{\lambda}{d} \right)$

It is independent of D i.e. distance between screen and slit.