What if the monochromatic light is replaced with electron beam in YDSE experiment?

Derive the expression for the intensity at a point where interference of light occurs. Arrive at the conditions for maximum and zero intensity.

Using monochromatic light of wavelength $\lambda$, an experimentalist sets up the Young's double slit experiment in three ways as shown.
If she observes that $y={\beta }^{\prime }$, the wavelength of light used is :

 

In the Young's double slit experiment a monochromatic source of wavelength $\lambda$ is used. The intensity of light passing through each slit is $I_0$. The intensity of light reaching the screen $S_c$ at a point $P$, a distance $X$ from $O$ is given by (Take $d<D$)

If $\mathrm{\beta }$ is the bandwidth, in Young's double slit experiment, the distance between the first dark band and sixth bright band is:

A diffraction pattern is obtained using a beam of red light.What happens if the red light is replaced by blue light ?

Two slits are $1 \mathrm{mm}$ apart and a screen is placed at some distance. When the slits are illuminated with light of wavelength $500 \mathrm{nm}$, fringe separation obtained on the screen is $0.5 \mathrm{mm}$. What is the distance between the screen and the slits?