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+clear
+//
+//
+//
+
+//Variable declaration
+t=0.9*10**-6 //thickness(m)
+mewe=1.486 //refractive index of e-ray
+mew0=1.658 //refractive index of o-ray
+
+//Calculation
+lamda1=4*t*(mew0-mewe) //wavelength for half wave plate(m)
+lamda2=2*t*(mew0-mewe) //wavelength for quarter wave plate(m)
+
+//Result
+printf("\n wavelength for half wave plate is %0.3f m",lamda1*10**9)
+printf("\n wavelength for quarter wave plate is %0.3f mm",lamda2*10**9)