In the image, which description below represents the L of the equation?

The distance between A and B

The distance between A and D

The distance between midpoints D, E, and F

The light bands between D and E and F

The explantion of this question is given below in the explanation section

Explanation:

The given problem is about the double slit-experiment problem.

The formula that we will use to figure out problems involving double slit experiments is given below.

Double slit-experiment equation.

Whereas:

λ = wavelength of light used (m)

x = distance from central fringe (m)

d = distance between the slits (m)

n = the order of the fringe

L = length from the screen with slits to the viewing screen (m)

So in the give option L is the distance between A and D

where are the vectors ?