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//Chapter-2,Example2_4_1,pg 2-24
wavelength_1=5000 //wavelength of light
wavelength_2=7000 //wavelength of light
N=4000 //number of lines per cm
m_1=1/((wavelength_1*10^-8)*N) //for wavelength= 5000 A.
m_2=1/((wavelength_2*10^-8)*N) //for wavelength= 7000 A.
printf('\nnumber of orders visible for 7000*10^-10 meter are %.2f\n',m_2)
printf('\nnumber of orders visible for 5000*10^-10 meter are %.1f\n',m_1)
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