//clc();
clear;
//To determine the wavelength of light in Fraulhofer double slit diffraction
D=150;              //distance between slit and screen in centimetres
d=0.03;              //seperation between slits in centimetres
beeta=0.3;          //fringe seperation in centimetres
lambda=(beeta*d*10^8)/D;
printf("wavelength of light if fringe seperation is 0.3 cm is %f Armstrong",lambda);