In a Young’s double-slit experiment, the path difference, at a certain point on the screen between two interfering waves is of wavelength. The ratio of the intensity at this point to that at the centre of a bright fringe is close to
Step 1: Given
Path difference,
Where is the wavelength.
Step 2: Determine the phase difference
The phase difference is given as:
Step 3: Determine the intensity ratio
Let be the intensity in the central fringe. In Young’s double-slit experiment, the intensity is given by
Therefore, option C is the correct option.