Question

Two coherent sources A and B of radio waves are 5m apart. Each source emits
waves with wavelength 6m. Consider points along the line between two
sources, at what distances, if any, from A is the interference constructive.

Answer 1

Explanation:

Since the wavelength is greater than distance between sources there is no path difference

so,5-x=x

2x=5

sox=2.5( it is easy to understand with figure so just make it understand and wavelength is cancelled in 5-x and x in denominator