Get illustration
Share — copy and redistribute the material in any medium or format
Adapt — remix, transform, and build upon the material for any purpose, even commercially.
Sharing and adapting of the illustration is allowed with indication of the link to the illustration.
The distance between the double slit and the screen is \( a \). The distance \( x \) is measured from the main maximum to some bright or dark interference fringe. The hypotenuse is \( h \). And \( \theta \) indicates at which angle the considered interference fringe is located. From this you can get the relation:\[ \sin(\theta) ~=~ \frac{x}{a} \]