clear
//
//
//

//Variable declaration
lamda=5000*10**-8     //wavelength(cm)
D=50             //separation between screen and slit(cm)
d=0.05           //separation between slits(cm)

//Calculation
beta1=lamda*D/d      //fringe width(cm)

//Result
printf("\n fringe width is %0.3f  cm",beta1)