Write the relation between path difference and phase difference?

The relation between phase difference and path difference is

When a simple harmonic progressive wave travels through the medium, the relation between phase difference and path difference is

What is the relation between phase difference and path difference ? The path difference at a point on the screen from two coherent sources is 5lambda//2 . Describe the possiblities of constructive and destructive interference at that point if the phase difference between the sources is either (i) pi or (ii) 2 pi .

Phase and phase difference

Write the relationship between the path difference and the wavelength of light used for constructive and destructive interference of light.

Phase and Phase Difference

Intensity with different phase difference

Write the relation between temperatures on different scales.

In Young's experiment, what will be the phase difference and the path difference between the light waves reaching (i) third bright fringe and (ii) third dark fringe from the central fringe. Take lambda = 5000 Å .