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//Chapter-1,Example1_3_3,pg 1-22
B=0.25 //fringe width
u=1.4 //refractive index of film
a=(20/3600)*(%pi/180) //angle made by film in radians
wavelength=2*a*B*u //as fringe width is 'B = wavelength/(2*a*u)'
printf("\nThe wavelength of monochromatic light is = %.8f cm\n",wavelength)
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