Derive the condition for bright and dark fringes produced due to diffraction by a single slit .

What is the condition for first minima in case of diffraction due to a single slit ?

Draw the well labelled diagram of diffraction of light at a single slit .

Explain what is meant by diffraction of light . Describe a simple experiment to demonstrate diffraction at a single slit.

Describe Young's double slit interference experiment and derive conditions for occurrence of dark and bright fringes on the screen. Define fringe width and derive a formula for it .

The region or locus of all the dark points produced due to interference of two identical light waves is

Derive an equation produced due to superposition of two waves.

The intensity of light coming from one of the slits in Young's experiment is twice the intensity of light coming from the other slit. What will be the approximate ratio of the intensities of the bright and dark fringes in the resulting interference pattern?

Derive an expression for fringe width for Bright and Dark bands.