The width of the central maximum of a diffraction pattern on a single slit does not depend upon:

Diffraction of light occurs only when the dimension of the obstacle is .....

If the measured angular separation between the second minimum to the left of the central maximum and the third minimum to the right of the central maximum is $30^{\circ}$ in a single slit diffraction pattern recorded using $628 \ nm$ light,then the width of the slit is . . . . . . $\mu m$.

The condition for observing Fraunhofer diffraction from a single slit is that the light wavefront incident on the slit should be

$A$ parallel monochromatic beam of light is incident normally on a narrow slit. $A$ diffraction pattern is formed on a screen placed perpendicular to the direction of the incident beam. At the first secondary maximum of the diffraction pattern,the phase difference between the rays coming from the edges of the slit is

Which of the following colourful patterns is due to the diffraction of light?