Question

Two beams of coherent light travel different paths, arriving at point P. If the maximum destructive interference is to occur at point P, what should be the path difference between the two waves?
The path difference between the two waves should be one and one-quarter of a wavelengths.
The path difference between the two waves should be two wavelengths.
The path difference between the two waves should be one-half of a wavelength.
The path difference between the two waves should be one wavelength.
The path difference between the two waves should be one-quarter of a wavelength.
The path difference between the two waves should be four wavelengths

Answer 1

"The path difference between the two waves should be one-quarter of a wavelength" is the statement among the choices given in the question that describes the path difference between the two waves. The correct option among all the options that are given in the question is the fifth statement or the penultimate statement.