what do you mean by diffraction of light and state the condition for the diffraction? obtain the condition for secondary maxima and minima.also draw the intensity distribution curve?

Diffraction is the phenomenon of bending of light around corners of an obstacle in the path of light.

Condition: Diffraction of light takes place if the size of the obstacle is comparable to the wavelength of the light.

The condition for secondary maxima is:

The condition for secondary maxima is:

Where, n = 1, 2, 3, …

The intensity distribution curve is shown below.