What is path difference between the two waves for constructive interference?

What is the difference between rum and whisky?

What is difference between minerals and ores?

What is the phase difference between two points on a wavefront?

What is the difference between Interference and Beats?

Write the conditions on path difference under which constructive interference occur in Young's double slit experiment.

What is the difference between matter waves and electromagnetic waves?

What is the basic difference between light waves and matter waves?

What is the difference between wave velocity and particle velocity?