Question

 Draw a labeled diagram of Young's apparatus for producing and observing optical interference.

 Indicate clearly on your diagram the distances that need to be measured to enable yon to determine the wavelength of light

Answer 1

Answer

Diagram of ydse apparatus is given

So wavelength is given by

Path difference $n\lambda$ =$\frac{xd}{D}$

So wavelength is given

$\lambda=\frac{xd}{nD}$