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+//Chapter 1 : Wave Optics
+
+clear;
+
+//Variable declaration
+i=35                 //incident angle in degrees
+myu=1.33             //refractive index 
+n=1                  //first minimum
+t=4*10**-5           //thickness
+
+//Calculations
+cos_r=0.90
+lamda1=2*myu*t*cos_r/10**-5        //for first order n=1
+lamda2=(2*myu*t*cos_r)/2/10**-5    //for second order n=2
+lamda3=(2*myu*t*cos_r)/3/10**-5    //for third order n=3
+
+//Result
+mprintf("(i)For the first order wavelength= %.2f*10**-5 cm" ,lamda1)
+//The answer provided in the textbook is incorrect
+mprintf("\n(ii)For the second order wavelength= %.2f*10**-5 cm",lamda2)
+mprintf("\n(iii)For the third order wavelength= %.2f*10**-5 cm",lamda3)
+