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//Chapter-1,Example 1_1,Page 1-16
clc()
//Given Data:
i=45*%pi/180 //angle of incidence
u=1.33 //Refractive index of a soap film
lam=5.896*10^-7 //wavelength of required yellow light
//Calculations:
//u=sin i/sin r //Snell's law .So,
r=asin(sin(i)/u) //angle of reflection
//Now, condition for bright fringe is
//2ut*cos r=(2n-1)lam/2
//Here n=1
t=lam/(2*2*u*cos(r)) //minimum thickness of film at which light will appear bright yellow
printf('Minimum thickness of film at which light will appear bright yellow of required wavelength is =%.10f m',t)
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