Question

In a double-slit experiment, the intensity of light measured halfway between the central maximum and the center of the first dark fringe is x W/m². What is the intensity at the central maximum? Give your answer in units of 10^-6 W/m²

Answer 1

In a Young's Double slit experiment, Intensity at a point is given by

where is phase difference, is maximum intensity

where is path difference, is wavelength.

The path difference at halfway between the central maximum and the center of the first dark fringe is .

Therefore,

  

Therefore according to question,the intensity of light measured halfway between the central maximum and the center of the first dark fringe is x W/m²

W/m²

which is Central maximum