clc 
// Given that
V = 25e3 // voltage in V
// Sample Problem 3 on page no. 20.8
printf("\n # PROBLEM 3 # \n")
printf("Standard formula used \n ")
printf("Lambda_min = 12400/V \n")
lambda_min = 12400 / V
printf("\n Minimum wavelength of x-ray is %f Angstrom.",lambda_min)