## Destructive interference condition (path difference)

` $$ \Delta s ~=~ \left( m - \frac{1}{2} \right) \, \lambda $$ `

` $$ \Delta s ~=~ \left( m - \frac{1}{2} \right) \, \lambda $$ `

` $$ \Delta s ~=~ m \, \lambda $$ `

` $$ \Delta s ~=~ \frac{x \, g}{a} $$ `