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clear
//
//
//
//Variable declaration
D25=0.8 //diameter of 25th ring(cm)
D5=0.3 //diameter of 5th ring(cm)
p=25-5
R=100 //radius of curvature(cm)
//Calculation
Nr=(D25**2)-(D5**2) //numerator
Dr=4*p*R //denominator
lamda=Nr/Dr //wavelength of light used(cm)
//Result
printf("\n wavelength of light used is %0.3f *10**-5 cm",lamda*10**5)
printf("\n answer given in the book is wrong")
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