In a single-slit diffraction experiment, the width of the slit is 1.90 μm. If a beam of light of wavelength 610 nm forms a diffraction pattern, what is the angle associated with the second dark fringe above the central bright fringe?
a) 39.9 degrees
b) 11.4 degrees
c) 18.7 degrees
d) 12.2 degrees

The the angle associated with the second dark fringe is 39.9°

Option (a) is correct.

Explanation:

Given:

Wavelength of light m

Width of the slit m

Order of diffraction

From the formula of single slit diffraction,

Where order of diffraction, angle associated with second dark fringe.

    39.9°

Therefore, the the angle associated with the second dark fringe is 39.9°